当前期刊: "宇宙星系"类期刊
显示样式:        排序: IF: - GO 导出
我的关注
我的收藏
您暂时未登录!
登录
  • Extended cuscuton as dark energy
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-07-01
    Aya Iyonaga, Kazufumi Takahashi and Tsutomu Kobayashi

    Late-time cosmology in the extended cuscuton theory is studied, in which gravity is modified while one still has no extra dynamical degrees of freedom other than two tensor modes. We present a simple example admitting analytic solutions for the cosmological background evolution that mimics ΛCDM cosmology. We argue that the extended cuscuton as dark energy can be constrained, like usual scalar-tensor

    更新日期:2020-07-02
  • Model comparison tests of modified gravity from the Eöt-Wash experiment
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-07-01
    Aditi Krishak and Shantanu Desai

    Perivolaropoulos et al. [1] (P19) have argued that the residual torque data in the Eöt-Wash experiment is consistent with an oscillating signal. This could either be a signature of non-local modified gravity theories or some other systematic error in the data. We independently assess the viability of such an oscillating signal in the same data using Bayesian and information theoretical criterion, to

    更新日期:2020-07-02
  • Primordial gravitational waves from galaxy intrinsic alignments
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-07-01
    Matteo Biagetti and Giorgio Orlando

    Galaxy shapes have been observed to align with external tidal fields generated by the large-scale structures of the Universe. While the main source for these tidal fields is provided by long-wavelength density perturbations, tensor perturbations also contribute with a non-vanishing amplitude at linear order. We show that parity-breaking gravitational waves produced during inflation leave a distinctive

    更新日期:2020-07-02
  • Consequences of neutrino self-interactions for weak decoupling and big bang nucleosynthesis
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-30
    E. Grohs, George M. Fuller and Manibrata Sen

    We calculate and discuss the implications of neutrino self-interactions for the physics of weak decoupling and big bang nucleosynthesis (BBN) in the early universe. In such neutrino-sector extensions of the standard model, neutrinos may not free-stream, yet can stay thermally coupled to one another. Nevertheless, the neutrinos exchange energy and entropy with the photon, electron-positron, and baryon

    更新日期:2020-07-01
  • Constant roll warm inflation in high dissipative regime
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-30
    Vahid Kamali, Michał Artymowski and Mohammad Reza Setare

    Constant-roll warm inflation is introduced in this work. A novel approach to finding an exact solution for Friedman equations in the constant-roll framework is presented for cold inflation and is extended to warm inflation with the constant dissipative parameter Q =Γ/3 H . The evolution of the primordial inhomogeneities of a scalar field in a thermal bath is also studied. The 1σ consistency between

    更新日期:2020-07-01
  • New class of hybrid metric-Palatini scalar-tensor theories of gravity
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-30
    A. Borowiec and A. Kozak

    A class of scalar-tensor theories (STT) including a non-metricity that unifies metric, Palatini and hybrid metric-Palatini gravitational actions with non-minimal interaction is proposed and investigated from the point of view of their consistency with generalized conformal transformations. It is shown that every such theory can be represented on-shell by a purely metric STT possessing the same solutions

    更新日期:2020-07-01
  • Reconciling H 0 tension in a six parameter space?
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-29
    Supriya Pan, Weiqiang Yang, Eleonora Di Valentino, Arman Shafieloo and Subenoy Chakraborty

    Consistent observations indicate that some of the important cosmological parameters measured through the local observations are in huge tension with their measurements from the global observations (within the minimal ΛCDM cosmology). The tensions in those cosmological parameters have been found to be either weakened or reconciled with the introduction of new degrees of freedom that effectively increases

    更新日期:2020-06-30
  • Gravitational couplings in Chameleon models
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-29
    Macarena Lagos and Hanjue Zhu

    We consider cosmological models where dark energy is described by a dynamical field equipped with the Chameleon screening mechanism, which serves to hide its effects in local dense regions and to conform to Solar System observations. In these models, there is no universal gravitational coupling and here we study the effective couplings that determine the force between massive objects, G N , and the

    更新日期:2020-06-30
  • Silica‐rich objects in the Acfer 182 CH chondrite: A new view
    Meteorit. Planet. Sci. (IF 2.863) Pub Date : 2020-06-30
    Maria Eugenia Varela

    Five silica‐rich objects (SRO) from Acfer 182 were studied. They have cryptocrystalline textures characterized by micro‐emulsion and amoeboid patterns that point toward the coexistence of pyroxene‐ and silica‐normative liquids that were quenched. Both objects have variable contents of refractory lithophile elements. Their positive Yb versus La correlation around primordial values suggests a cosmochemical

    更新日期:2020-06-30
  • Combining IR and X‐ray microtomography data sets: Application to Itokawa particles and to Paris meteorite
    Meteorit. Planet. Sci. (IF 2.863) Pub Date : 2020-06-29
    Zelia Dionnet; Rosario Brunetto; Alice Aléon‐Toppani; Stefano Rubino; Donia Baklouti; Ferenc Borondics; Anne‐Cécile Buellet; Zahia Djouadi; Andrew King; Tomoki Nakamura; Alessandra Rotundi; Christophe Sandt; David Troadec; Akira Tsuchiyama

    In the near future, a new generation of sample return missions (Hayabusa2, OSIRIS‐REx, MMX, etc.) will collect samples from small solar system bodies. To maximize the scientific outcome of laboratory studies and minimize the loss of precious extraterrestrial samples, an analytical sequence from less destructive to more destructive techniques needs to be established. In this work, we present a combined

    更新日期:2020-06-30
  • Superposition of FLRW universes
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-28
    Metin Gürses, Yaghoub Heydarzade and Bayram Tekin

    We show that (1) the Einstein field equations with a perfect fluid source admit a nonlinear superposition of two distinct homogenous Friedman-Lemaitre-Robertson-Walker (FLRW) metrics as a solution, (2) the superposed solution is an inhomogeneous geometry in general, (3) it reduces to a homogeneous one in the two asymptotes which are the early and the late stages of the universe as described by two

    更新日期:2020-06-29
  • The evidence of cosmic acceleration and observational constraints
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-28
    Yingjie Yang and Yungui Gong

    Directly comparing the 6 expansion rate measured by type Ia supernovae data and the lower bound on the expansion rate set by the strong energy conditions or the null hypothesis that there never exists cosmic acceleration, we see 3σ direct evidence of cosmic acceleration and the Rh = ct model is strongly excluded by the type Ia supernovae data. We also use Gaussian process method to reconstruct the

    更新日期:2020-06-29
  • The sulfurization recorded in tridymite in the monomict eucrite Northwest Africa 11591
    Meteorit. Planet. Sci. (IF 2.863) Pub Date : 2020-06-29
    Li‐Lin Huang; Bing‐Kui Miao; Guo‐Zhu Chen; Hui‐Min Shao; Zi‐Yuan Ouyang

    Some of the tridymite in the monomict Northwest Africa (NWA) 11591 eucrite are found to have sulfide‐rich replacement textures (SRTs) to varying degrees. The SRTs of tridymite in NWA 11591 are characterized by the distribution of loose porous regions with aggregates of quartz and minor troilite grains along the rims and fractures of the tridymite, and we propose a new mechanism for the origin of this

    更新日期:2020-06-29
  • Dirac neutrinos and N eff
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-25
    Xuheng Luo, Werner Rodejohann and Xun-Jie Xu

    If neutrinos are Dirac particles the existence of light right-handed neutrinos ν R is implied. Those would contribute to the effective number of relativistic neutrino species N eff in the early Universe. With pure standard model interactions, the contribution is negligibly small. In the presence of new interactions, however, the contribution could be significantly enhanced. We consider the most general

    更新日期:2020-06-26
  • The effects of possible contamination by sample holders on samples to be returned by Hayabusa2
    Meteorit. Planet. Sci. (IF 2.863) Pub Date : 2020-06-26
    Naoki Shirai; Yuzuru Karouji; Kazuya Kumagai; Masayuki Uesugi; Kaori Hirahara; Motoo Ito; Naotaka Tomioka; Kentaro Uesugi; Akira Yamaguchi; Naoya Imae; Takuji Ohigashi; Toru Yada; Masanao Abe

    Chemical compositions of materials used for new sample holders (vertically aligned carbon nanotubes [VACNTs] and polyimide film), which were developed for the analysis of Hayabusa2‐return samples, were determined by instrumental neutron activation analysis and/or instrumental photon activation analysis, to estimate contamination effects from the sample holders. The synthetic quartz plate used for the

    更新日期:2020-06-26
  • The micrometeorite flux to Earth during the earliest Paleogene reconstructed in the Bottaccione section (Umbrian Apennines), Italy
    Meteorit. Planet. Sci. (IF 2.863) Pub Date : 2020-06-26
    Samuele Boschi; Birger Schmitz; Ellinor Martin; Fredrik Terfelt

    Based on sediment‐dispersed extraterrestrial spinel grains in the Bottaccione limestone section in Italy, we reconstructed the micrometeorite flux to Earth during the early Paleocene. From a total of 843 kg of limestone, 86 extraterrestrial spinel grains (12 grains > 63 μm, and 74 in the 32–63 μm fraction) have been recovered. Our results indicate that the micrometeorite flux was not elevated during

    更新日期:2020-06-26
  • Black hole shadow in the view of freely falling observers
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-24
    Zhe Chang and Qing-Hua Zhu

    First sketch of black hole from M87 galaxy was obtained by Event Horizon Telescope, recently. As appearance of black hole shadow reflects space-time geometry of black holes, observations of black hole shadow may be a promising way to test general relativity in strong field regime. In this paper, we focus on angular radius of spherical black hole shadow with respect to freely falling observers. In the

    更新日期:2020-06-25
  • Mitigating the impact of fiber assignment on clustering measurements from deep galaxy redshift surveys
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-24
    Tomomi Sunayama, Masahiro Takada, Martin Reinecke, Ryu Makiya, Takahiro Nishimichi, Eiichiro Komatsu, Shun Saito, Naoyuki Tamura and Kiyoto Yabe

    We examine the impact of fiber assignment on clustering measurements from fiber-fed spectroscopic galaxy surveys. We identify new effects which were absent in previous, relatively shallow galaxy surveys such as Baryon Oscillation Spectroscopic Survey (BOSS). Specifically, we consider deep surveys covering a wide redshift range such as0.6≤ z ≤ 2.4, as in the Subaru Prime Focus Spectrograph (PFS) survey

    更新日期:2020-06-25
  • Large field excursions from dimensional (de)construction
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-24
    Kazuyuki Furuuchi, Suvedha Suresh Naik and Noel Jonathan Jobu

    An inflation model based on dimensional (de)construction of a massive gauge theory is proposed. The inflaton in this model is the "zero-mode" of a component of the massive gauge field in the (de)constructed extra dimensions. The inflaton potential originates from the gauge invariant Stueckelberg potential. At low energy, the field range of the inflaton is enhanced by a factor N d /2 compared to the

    更新日期:2020-06-25
  • Rejecting the Majorana nature of dark matter with electron scattering experiments
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-24
    Riccardo Catena, Timon Emken and Julia Ravanis

    Assuming that Dark Matter (DM) is made of fermions in the sub-GeV mass range with interactions dominated by electromagnetic moments of higher order, such as the electric and magnetic dipoles or the anapole moment, we show that direct detection experiments searching for atomic ionisation events in xenon targets can shed light on whether DM is a Dirac or Majorana particle. Specifically, we find that

    更新日期:2020-06-25
  • Thermodynamics of f ( R ) theories of gravity
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-24
    C.D. Peralta and S.E. Jorás

    This paper starts from a toy model for inflation in a class of modified theories of gravity in the metric formalism. Instead of the standard procedure—assuming a non-linear Lagrangian f ( R ) in the Jordan frame—we start from a simple ##IMG## [https://ej.iop.org/icons/Entities/phi.gif] {phi} 2 potential in the Einstein frame and investigate the corresponding f ( R ) in the former picture. The addition

    更新日期:2020-06-25
  • Spectro-imaging forward model of red and blue galaxies
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-23
    Martina Fagioli, Luca Tortorelli, Jörg Herbel, Dominik Zürcher, Alexandre Refregier and Adam Amara

    For the next generation of spectroscopic galaxy surveys, it is important to forecast their performances and to accurately interpret their large data sets. For this purpose, it is necessary to consistently simulate different populations of galaxies, in particular Emission Line Galaxies (ELGs), less used in the past for cosmological purposes. In this work, we further the forward modeling approach presented

    更新日期:2020-06-24
  • Vacuum decay in the Standard Model: analytical results with running and gravity
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-23
    J.R. Espinosa

    A tunneling bounce driving the decay of a metastable vacuum must respect an integral constraint dictated by simple scaling arguments that is very useful to determine key properties of the bounce. After illustrating how this works in a simple toy model, the Standard Model Higgs potential is considered, including quartic coupling running and gravitational corrections as sources of scale invariance breaking

    更新日期:2020-06-24
  • The structure of dissipative dark matter halos
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-23
    Ran Huo, Hai-Bo Yu and Yi-Ming Zhong

    Dissipative dark matter self-interactions can affect halo evolution and change its structure. We perform a series of controlled N -body simulations to study impacts of the dissipative interactions on halo properties. The interplay between gravitational contraction and collisional dissipation can significantly speed up the onset of gravothermal collapse, resulting in a steep inner density profile. For

    更新日期:2020-06-24
  • Caleta el Cobre 022 Martian meteorite: Increasing nakhlite diversity
    Meteorit. Planet. Sci. (IF 2.863) Pub Date : 2020-06-24
    L. Krämer Ruggiu; J. Gattacceca; B. Devouard; A. Udry; V. Debaille; P. Rochette; J.‐P. Lorand; L. Bonal; P. Beck; V. Sautter; H. Busemann; M. M. M. Meier; C. Maden; G. Hublet; R. Martinez

    Caleta el Cobre (CeC) 022 is a Martian meteorite of the nakhlite group, showing an unbrecciated cumulate texture, composed mainly of clinopyroxene and olivine. Augite shows irregular core zoning, euhedral rims, and thin overgrowths enriched in Fe relative to the core. Low‐Ca pyroxene is found adjacent to olivine. Phenocrysts of Fe‐Ti oxides are titanomagnetite with exsolutions of ilmenite/ulvöspinel

    更新日期:2020-06-24
  • X‐ray computed tomography: Morphological and porosity characterization of giant Antarctic micrometeorites
    Meteorit. Planet. Sci. (IF 2.863) Pub Date : 2020-06-23
    Zelia Dionnet; Martin D. Suttle; Andrea Longobardo; Alessandra Rotundi; Luigi Folco; Vincenzo Della Corte; Andrew King

    Giant micrometeorites (MMs; 400–2000 µm) are exceedingly rare and scientifically valuable. Three‐dimensional nondestructive characterization by X‐ray computed tomography (X‐CT) provides information on the petrography and thus petrogenesis of MMs and serves as a guide to maximize subsequent multi‐analytical studies on such precious planetary materials. Here, we discuss the results obtained by X‐CT on

    更新日期:2020-06-23
  • Neutrino propagation hinders fast pairwise flavor conversions
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-21
    Shashank Shalgar, Ian Padilla-Gay and Irene Tamborra

    Neutrino flavor conversions may dramatically affect the inner working of compact astrophysical objects as well as the synthesis of the heavier elements. We present the first sophisticated numerical solution of the neutrino flavor conversion within a (2+1+1) dimensional setup: we include the advective term in the neutrino equations of motion and track the flavor evolution in two spatial dimensions,

    更新日期:2020-06-23
  • Deformation of the gravitational wave spectrum by density perturbations
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-21
    Valerie Domcke, Ryusuke Jinno and Henrique Rubira

    We study the effect of primordial scalar curvature perturbations on the propagation of gravitational waves over cosmic distances. We point out that such curvature perturbations deform the isotropic spectrum of any stochastic background of gravitational waves of primordial origin through the (integrated) Sachs-Wolfe effect. Computing the changes in the amplitude and frequency of the propagating gravitational

    更新日期:2020-06-23
  • Regular black holes via the Kerr-Schild construction in DHOST theories
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-21
    Eugeny Babichev, Christos Charmousis, Adolfo Cisterna and Mokhtar Hassaine

    We extend the standard Kerr-Schild solution generating method to higher order scalar tensor theories that are shift-invariant for the scalar field. Certain degeneracy conditions, crucial for the absence of Ostrogradski ghosts, are found to be required for the validity of the Kerr-Schild ansatz while on the other hand, theories with no parity symmetry are excluded from the solution generating method

    更新日期:2020-06-23
  • Primordial black holes confront LIGO/Virgo data: current situation
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-21
    V. De Luca, G. Franciolini, P. Pani and A. Riotto

    The LIGO and Virgo Interferometers have so far provided 11 gravitational-wave (GW) observations of black-hole binaries. Similar detections are bound to become very frequent in the near future. With the current and upcoming wealth of data, it is possible to confront specific formation models with observations. We investigate here whether current data are compatible with the hypothesis that LIGO/Virgo

    更新日期:2020-06-23
  • Boosting ultraviolet freeze-in in NO models
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-21
    Nicolás Bernal, Javier Rubio and Hardi Veermäe

    We present a novel UV freeze-in mechanism for enhancing the dark matter abundance in cosmologies where inflation is followed by an epoch dominated by a fluid stiffer than radiation. In such scenarios, even a small radiation abundance, produced for instance by instantaneous preheating effects, will eventually dominate the total energy density of the Universe without the need for a complete inflaton

    更新日期:2020-06-23
  • Implications for cosmology from ground-based Cosmic Microwave Background observations
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-21
    Ke Wang and Qing-Guo Huang

    Cosmic Microwave Background (CMB) anisotropy encodes a lot of information about our Universe. In this paper we take the ground-based CMB observations (GCMB), including the South Pole Telescope (SPT), SPTpol and the Atacama Cosmology Telescope Polarimeter (ACTPol), as a new probe to the CMB anisotropy independent of two satellite observations, i.e. Wilkinson Microwave Anisotropy Probe (WMAP) and Planck

    更新日期:2020-06-23
  • A practical and consistent parametrization of dark matter self-interactions
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-21
    Xiaoyong Chu, Camilo Garcia-Cely and Hitoshi Murayama

    Self-interacting dark matter has been proposed to explain the apparent mass deficit in astrophysical small-scale halos, while observations from galaxy clusters suggest that the corresponding cross section depends on the velocity. Accounting for this is often believed to be highly model-dependent with studies mostly focusing on scenarios with light mediators. Based on the effective-range formalism,

    更新日期:2020-06-23
  • Amorphous silicates as a record of solar nebular and parent body processes—A transmission electron microscope study of fine‐grained rims and matrix in three Antarctic CR chondrites
    Meteorit. Planet. Sci. (IF 2.863) Pub Date : 2020-06-22
    Christian Vollmer; Mandy Pelka; Jan Leitner; Arne Janssen

    Renazzo‐type (CR) carbonaceous chondrites belong to one of the most pristine meteorite groups containing various early solar system components such as matrix and fine‐grained rims (FGRs), whose formation mechanisms are still debated. Here, we have investigated FGRs of three Antarctic CR chondrites (GRA 95229, MIL 07525, and EET 92161) by electron microscopy techniques. We specifically focused on the

    更新日期:2020-06-23
  • High‐pressure metamorphic mineralogy of the Martian crust with implications for density and seismic profiles
    Meteorit. Planet. Sci. (IF 2.863) Pub Date : 2020-06-22
    Julia Semprich; Justin Filiberto

    Here, we calculate the mineralogy of the Martian lower crust and upper mantle as a function of pressure and temperature with depth using four bulk compositions (average crust, Gusev basalt, olivine‐phyric shergottite, and primitive average mantle). We then use this mineralogy to extract rock properties such as density and seismic velocities, describe their changes with varying conditions and geotherms

    更新日期:2020-06-23
  • Extraterrestrial organic compounds and cyanide in the CM2 carbonaceous chondrites Aguas Zarcas and Murchison
    Meteorit. Planet. Sci. (IF 2.863) Pub Date : 2020-06-22
    José C. Aponte; Hannah L. McLain; Danielle N. Simkus; Jamie E. Elsila; Daniel P. Glavin; Eric T. Parker; Jason P. Dworkin; Dolores H. Hill; Harold C. Connolly; Dante S. Lauretta

    Evaluating the water‐soluble organic composition of carbonaceous chondrites is key to understanding the inventory of organic matter present at the origins of the solar system and the subsequent processes that took place inside asteroid parent bodies. Here, we present a side‐by‐side analysis and comparison of the abundance and molecular distribution of aliphatic amines, aldehydes, ketones, mono‐ and

    更新日期:2020-06-23
  • Generalized non-minimal derivative coupling: application to inflation and primordial black hole production
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-18
    Ioannis Dalianis, Stelios Karydas and Eleftherios Papantonopoulos

    We introduce inflationary models where the inflaton features a field dependent non-minimal derivative coupling to the Einstein tensor, that we name GNMDC. This Horndeski term gives new and distinguishable inflationary predictions in a framework that ameliorates possible problems related with gradient instabilities during the reheating stage. We examine the inflationary phenomenology using power law

    更新日期:2020-06-19
  • Quantifying the impacts of future gravitational-wave data on constraining interacting dark energy
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-18
    Hai-Li Li, Dong-Ze He, Jing-Fei Zhang and Xin Zhang

    In this work, we investigate the impacts of the future gravitational-wave (GW) standard siren observation by the Einstein Telescope (ET) on constraining the interacting dark energy (IDE) models. We simulate 1000 GW events in the redshift range of 0 ##IMG## [https://ej.iop.org/icons/Entities/lesssim.gif] {lesssim} z ##IMG## [https://ej.iop.org/icons/Entities/lesssim.gif] {lesssim} 50 based on the 10-year

    更新日期:2020-06-19
  • Erratum: Axion boson stars
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-18
    Davide Guerra, Caio F.B. Macedo and Paolo Pani

    Please see the PDF file for details.

    更新日期:2020-06-19
  • Probing a r − n modification of the Newtonian potential with exoplanets
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-18
    Matteo Luca Ruggiero and Lorenzo Iorio

    The growing availability of increasingly accurate data on transiting exoplanets suggests the possibility of using these systems as possible testbeds for modified models of gravity. In particular, we suggest that the post-Keplerian (pK) dynamical effects from the perturbations of the Newtonian potential falling off as the square or the cube of the distance from the mass of the host star break the degeneracy

    更新日期:2020-06-19
  • Galaxy redshift-space bispectrum: the importance of being anisotropic
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-18
    D. Gualdi and L. Verde

    We forecast the benefits induced by adding the bispectrum anisotropic signal to the standard, two- and three-point, clustering statistics analysis. In particular, we forecast cosmological parameter constraints including the bispectrum higher multipoles terms together with the galaxy power spectrum (monopole plus quadrupole) and isotropic bispectrum (monopole) data vectors. To do so, an analytical covariance

    更新日期:2020-06-19
  • Curvature perturbations from stochastic particle production during inflation
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-18
    Marcos A.G. Garcia, Mustafa A. Amin and Daniel Green

    We calculate the curvature power spectrum sourced by spectator fields that are excited repeatedly and non-adiabatically during inflation. In the absence of detailed information of the nature of spectator field interactions, we consider an ensemble of models with intervals between the repeated interactions and interaction strengths drawn from simple probabilistic distributions. We show that the curvature

    更新日期:2020-06-19
  • Julius Obsequens’s book, Liber Prodigiorum: A Roman era record of meteorite falls, fireballs, and other celestial phenomena
    Meteorit. Planet. Sci. (IF 2.863) Pub Date : 2020-06-19
    Annarita Franza; Giovanni Pratesi

    Julius Obsequens was the pseudonym of a Roman historian presumably living in the 4th century ad , whose life is shrouded in mystery. All that is known about Obsequens’s biography is that he was the author of a book entitled Liber Prodigiorum (Book of Prodigies ), a collection of prodigies deduced from Livy’s Ab Urbe Condita Libri (Books from the Founding of the City ). The Liber Prodigiorum covered

    更新日期:2020-06-19
  • Rotating axion boson stars
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-16
    Jorge F.M. Delgado, Carlos A.R. Herdeiro and Eugen Radu

    We construct and study rotating axion boson stars (RABSs). These are the spinning generalisations of the spherical gravitating solitons recently introduced in [1]. RABSs are asymptotically flat, stationary, axially symmetric, everywhere regular solutions of the Einstein-Klein-Gordon theory, in the presence of a periodic scalar potential arising in models of axion-like particles. The potential is characterised

    更新日期:2020-06-17
  • The Meteoritical Bulletin, no. 108
    Meteorit. Planet. Sci. (IF 2.863) Pub Date : 2020-06-16
    Jérôme Gattacceca; Francis M. McCubbin; Audrey Bouvier; Jeffrey N. Grossman

    Meteoritical Bulletin 108 contains 2141 meteorites including 12 falls (Aguas Zarcas, Benenitra, Jalangi, Komaki, Ksar El Goraane, Mhabes el Hamra, Natun Balijan, Oued Sfayat, Shidian, Taqtaq‐e Rasoul, Tocache, Viñales), with 1640 ordinary chondrites, 149 carbonaceous chondrites, 134 HED achondrites, 45 lunar meteorites, 38 ureilites, 27 iron meteorites, 23 Martian meteorites, 22 primitive achondrites

    更新日期:2020-06-16
  • The integrated angular bispectrum
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-15
    Gabriel Jung, Filippo Oppizzi, Andrea Ravenni and Michele Liguori

    We study the position-dependent power spectrum and the integrated bispectrum statistic for 2D cosmological fields on the sphere (integrated angular bispectrum). First, we derive a useful, m -independent, formula for the full-sky integrated angular bispectrum, based on the construction of azimuthally symmetric patches. We then implement a pipeline for integrated angular bispectrum estimation, including

    更新日期:2020-06-15
  • General Relativity solutions with stealth scalar hair in quadratic higher-order scalar-tensor theories
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-15
    Kazufumi Takahashi and Hayato Motohashi

    We explore General Relativity solutions with stealth scalar hair in general quadratic higher-order scalar-tensor theories. Adopting the assumption that the scalar field has a constant kinetic term, we derive in a fully covariant manner a set of conditions under which the Euler-Lagrange equations allow General Relativity solutions as exact solutions in the presence of a general matter component minimally

    更新日期:2020-06-15
  • Asymptotic expansions for Large Scale Structure
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-15
    Shi-Fan Chen and Massimo Pietroni

    We explore the deep ultraviolet (that is, short-distance) limit of the power spectrum (PS) and of the correlation function of a cold dark matter dominated Universe. While for large scales the PS can be written as a double series expansion, in powers of the linear PS and of the wavenumber k , we show that, in the opposite limit, it can be expressed via an expansion in powers of the form 1/ k d +2 n

    更新日期:2020-06-15
  • Variation in the fine-structure constant and the distance-duality relation
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-15
    Rodrigo S. Gonçalves, Susana Landau, Jailson S. Alcaniz and Rodrigo F.L. Holanda

    The possibility of variation of the fundamental constants of nature has been a long-standing question, with important consequences for fundamental physics and cosmology. In particular, it has been shown that variations in the fine-structure constant, α, are directly related to violation of the distance duality relation (DDR), which holds true as long as photons travel on unique null geodesics and their

    更新日期:2020-06-15
  • Observable quantum loop effects in the sky
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-14
    A.A. Abolhasani and M.M. Sheikh-Jabbari

    Expanding on [1], we analyze in detail the single field chaotic inflationary models plus a cosine modulation term, augmented by a light scalar field with inflaton dependent oscillatory mass term. We work out in detail the Feynman diagrams and compute one, two and in general estimate higher loop two and three point functions in the in-in formulation. We explicitly establish how the oscillatory mass

    更新日期:2020-06-14
  • The viable f ( G ) gravity models via reconstruction from the observations
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-14
    Seokcheon Lee and Gansukh Tumurtushaa

    We reconstruct the viable f ( G ) gravity models from the observations and provide the analytic solutions that well describe our numerical results. In order to avoid unphysical challenges that occur during the numerical reconstruction, we generalize f ( G ) models into f ( G A ), which is the simple extension of f ( G ) models with the introduction of a constant A parameter. We employ several observational

    更新日期:2020-06-14
  • Renormalization-group running induced cosmic inflation
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-14
    I.G. Márián, N. Defenu, U.D. Jentschura, A. Trombettoni and I. Nándori

    As a contribution to a viable candidate for a standard model of cosmology, we here show that pre-inflationary quantum fluctuations can provide a scenario for the long-sought initial conditions for the inflaton field. Our proposal is based on the assumption that at very high energies (higher than the energy scale of inflation) the vacuum-expectation value (VeV) of the field is trapped in a false vacuum

    更新日期:2020-06-14
  • Impact of polarized galactic foreground emission on CMB lensing reconstruction and delensing of B-modes
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-14
    Dominic Beck, Josquin Errard and Radek Stompor

    Next generation CMB experiments such as CMB-S4 aim at measuring the CMB lensing potential at sub-percent precision where most of the constraining power will come from CMB polarization. We investigate the prospects of achieving this goal in the presence of large-scale, diffuse galactic foreground emission by using non-Gaussian sky simulations and exploit multi-frequency information to clean those. We

    更新日期:2020-06-14
  • Weighing neutrinos with the halo environment
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-14
    Arka Banerjee, Emanuele Castorina, Francisco Villaescusa-Navarro, Travis Court and Matteo Viel

    Nonlinear objects like halos and voids exhibit a scale-dependent bias on linear scales in massive neutrino cosmologies. The shape of this scale-dependent bias is a unique signature of the neutrino masses, but the amplitude of the signal is generally small, of the order of f ν , the contribution of neutrinos to the total matter content ( ##IMG## [https://ej.iop.org/icons/Entities/lesssim.gif] {lesssim} 1%)

    更新日期:2020-06-14
  • Variations in fundamental constants at the cosmic dawn
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-11
    Laura Lopez-Honorez, Olga Mena, Sergio Palomares-Ruiz, Pablo Villanueva-Domingo and Samuel J. Witte

    The observation of space-time variations in fundamental constants would provide strong evidence for the existence of new light degrees of freedom in the theory of Nature. Robustly constraining such scenarios requires exploiting observations that span different scales and probe the state of the Universe at different epochs. In the context of cosmology, both the cosmic microwave background and the Lyman-α

    更新日期:2020-06-11
  • Baryon-Interacting Dark Matter: heating dark matter and the emergence of galaxy scaling relations
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-11
    Benoit Famaey, Justin Khoury, Riccardo Penco and Anushrut Sharma

    The empirical scaling relations observed in disk galaxies remain challenging for models of galaxy formation. The most striking among these is the Mass Discrepancy-Acceleration Relation (MDAR), which encodes both a tight baryonic Tully-Fisher relation (BTFR) and the observed diversity of galaxy rotation curves through the central surface density relation (CSDR) . Building on our earlier work [1], we

    更新日期:2020-06-11
  • Dark matter cores and cusps in spiral galaxies and their explanations
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-11
    Manoj Kaplinghat, Tao Ren and Hai-Bo Yu

    We compare proposed solutions to the core vs cusp issue of spiral galaxies, which has also been framed as a diversity problem, and demonstrate that the cuspiness of dark matter halos is correlated with the stellar surface brightness. We compare the rotation curve fits to the SPARC sample from a self-interacting dark matter (SIDM) model, which self-consistently includes the impact of baryons on the

    更新日期:2020-06-11
  • Raman study of shock features in plagioclase feldspar from the Mistastin Lake impact structure, Canada
    Meteorit. Planet. Sci. (IF 2.863) Pub Date : 2020-06-11
    Tianqi Xie; Gordon R. Osinski; Sean R. Shieh

    Plagioclase feldspar is one of the most abundant minerals on the surface of the Earth, the Moon, and Mars, and is also commonly found in meteorites. Studying shock effects in feldspar thus provides us with fundamental information about impact cratering processes on planetary bodies. In this study, plagioclase from monomict and polymict breccias, impact melt rocks, and shock‐metamorphosed target rocks

    更新日期:2020-06-11
  • Comparison of the Planck 2018 CMB polarization maps in the BICEP2/Keck region
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-10
    Hao Liu, James Creswell and Pavel Naselsky

    We examine the statistical properties of polarization maps from Planck 2018 within the patch of sky observed by the BICEP2/Keck experiment using the one point distribution function (1PDF), skewness, and kurtosis statistics. Our analysis is performed for the Q and U Stokes parameters and for the corresponding E- and B-modes of the CMB signals. We extend our analysis by studying the correlations between

    更新日期:2020-06-10
  • Effects of gravitational Chern-Simons during Axion-SU(2) inflation
    J. Cosmol. Astropart. Phys. (IF 5.21) Pub Date : 2020-06-10
    Leila Mirzagholi, Eiichiro Komatsu, Kaloian D. Lozanov and Yuki Watanabe

    In this paper we examine the viability of inflation models with a spectator axion field coupled to both gravitational and SU(2) gauge fields via Chern-Simons couplings. Requiring phenomenological success of the axion-SU(2) sector constrains the coupling strength of the gravitational Chern-Simons term. We find that the impact of this term on the production and propagation of gravitational waves can

    更新日期:2020-06-10
Contents have been reproduced by permission of the publishers.
导出
全部期刊列表>>
自然科研论文编辑服务
ACS ES&T Engineering
ACS ES&T Water
屿渡论文,编辑服务
鲁照永
复旦大学
苏州大学
南京工业大学
南开大学
中科大
唐勇
跟Nature、Science文章学绘图
隐藏1h前已浏览文章
中洪博元
课题组网站
新版X-MOL期刊搜索和高级搜索功能介绍
ACS材料视界
x-mol收录
广东实验室
南京大学
陈永胜
南科大
刘尊峰
湖南大学
清华大学
王小野
中山大学化学工程与技术学院
试剂库存
天合科研
down
wechat
bug