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  • INTEGRAL results on the electron-positron annihilation radiation and X-ray & Gamma-ray diffuse emission of the Milky Way
    New Astron. Rev. (IF 4.2) Pub Date : 2020-09-22
    Eugene Churazov; Laurent Bouchet; Pierre Jean; Elisabeth Jourdain; Jürgen Knödlseder; Roman Krivonos; Jean-Pierre Roques; Sergey Sazonov; Thomas Siegert; Andrew Strong; Rashid Sunyaev

    This review summarizes INTEGRAL results on two topics: the electron-positron annihilation line and X-ray & Gamma-ray diffuse emission of the Milky Way. The electron-positron annihilation line at 511 keV is the most prominent spectral feature in the gamma-ray spectrum of the Milky Way. From the observational perspective, INTEGRAL has already provided constraints on the total flux, morphology of the

    更新日期:2020-10-04
  • Advances in Understanding High-Mass X-ray Binaries with INTEGRALand Future Directions
    New Astron. Rev. (IF 4.2) Pub Date : 2020-09-09
    Peter Kretschmar; Felix Fürst; Lara Sidoli; Enrico Bozzo; Julia Alfonso-Garzón; Arash Bodaghee; Sylvain Chaty; Masha Chernyakova; Carlo Ferrigno; Antonios Manousakis; Ignacio Negueruela; Konstantin Postnov; Adamantia Paizis; Pablo Reig; José Joaquín Rodes-Roca; Sergey Tsygankov; Antony J. Bird; Matthias Bissinger né Kühnel; Shu Zhang

    High mass X-ray binaries are among the brightest X-ray sources in the Milky Way, as well as in nearby Galaxies. Thanks to their highly variable emissions and complex phenomenology, they have attracted the interest of the high energy astrophysical community since the dawn of X-ray Astronomy. In more recent years, they have challenged our comprehension of physical processes in many more energy bands

    更新日期:2020-09-10
  • The INTEGRAL view of the pulsating hard X-ray sky: from accreting and transitional millisecond pulsars to rotation-powered pulsars and magnetars
    New Astron. Rev. (IF 4.2) Pub Date : 2020-08-28
    A. Papitto; M. Falanga; W. Hermsen; S. Mereghetti; L. Kuiper; J. Poutanen; E. Bozzo; F. Ambrosino; F. Coti Zelati; V. De Falco; D. de Martino; T. Di Salvo; P. Esposito; C. Ferrigno; M. Forot; D. Götz; C. Gouiffes; R. Iaria; D.F. Torres

    In the last 25 years a new generation of X-ray satellites imparted a significant leap forward in our knowledge of X-ray pulsars. The discovery of accreting and transitional millisecond pulsars proved that disk accretion can spin up a neutron star to a very high rotation speed. The detection of MeV-GeV pulsed emission from a few hundreds of rotation-powered pulsars probed particle acceleration in the

    更新日期:2020-08-28
  • INTEGRAL results on gamma-ray bursts and polarization of hard X-ray sources
    New Astron. Rev. (IF 4.2) Pub Date : 2020-08-25
    Diego Götz, Christian Gouiffès, Jérôme Rodriguez, Philippe Laurent, Elisabeth Jourdain, Jean-Pierre Roques, Sandro Mereghetti, Alexander Lutovinov, Volodymyr Savchenko, Lorraine Hanlon, Antonio Martin-Carrillo, Paul Moran
    更新日期:2020-08-25
  • Relativistic Jets of Blazars
    New Astron. Rev. (IF 4.2) Pub Date : 2020-08-12
    Talvikki Hovatta, Elina Lindfors

    Relativistic jets of active galactic nuclei have been known to exist for 100 years. Blazars with their jet pointing close to our line of sight are some of the most variable and extreme objects in the universe, showing emission from radio to very-high-energy gamma rays. In this review, we cover relativistic jets of blazars from an observational perspective with the main goal of discussing how observations

    更新日期:2020-08-12
  • The Galactic LMXB Population and the Galactic Centre Region
    New Astron. Rev. (IF 4.2) Pub Date : 2020-08-12
    S. Sazonov, A. Paizis, A. Bazzano, I. Chelovekov, I. Khabibullin, K. Postnov, I. Mereminskiy, M. Fiocchi, G. Bélanger, A.J. Bird, E. Bozzo, J. Chenevez, M. Del Santo, M. Falanga, R. Farinelli, C. Ferrigno, S. Grebenev, R. Krivonos, J. Wilms

    Seventeen years of hard X-ray observations with the instruments of the INTEGRAL observatory, with a focus on the Milky Way and in particular on the Galactic Centre region, have provided a unique database for exploration of the Galactic population of low-mass X-ray binaries (LMXBs). Our understanding of the diverse energetic phenomena associated with accretion of matter onto neutron stars and black

    更新日期:2020-08-12
  • Particle acceleration in astrophysical jets
    New Astron. Rev. (IF 4.2) Pub Date : 2020-07-31
    James H. Matthews; Anthony R. Bell; Katherine M. Blundell

    In this chapter, we review some features of particle acceleration in astrophysical jets. We begin by describing four observational results relating to the topic, with particular emphasis on jets in active galactic nuclei and parallels between different sources. We then discuss the ways in which particles can be accelerated to high energies in magnetised plasmas, focusing mainly on shock acceleration

    更新日期:2020-07-31
  • The case for jets in cataclysmic variables
    New Astron. Rev. (IF 4.2) Pub Date : 2020-07-31
    Deanne L. Coppejans, Christian Knigge

    For decades cataclysmic variables (CVs) were thought to be one of the few classes of accreting compact objects to not launch jets, and have consequently been used to constrain jet launching models. However, recent theoretical and observational advances indicate that CVs do in fact launch jets. Specifically, it was demonstrated that their accretion-outflow cycle is analogous to that of their higher

    更新日期:2020-07-31
  • Radio galaxies and feedback from AGN jets
    New Astron. Rev. (IF 4.2) Pub Date : 2020-07-31
    M.J. Hardcastle, J.H. Croston

    We review current understanding of the population of radio galaxies and radio-loud quasars from an observational perspective, focusing on their large-scale structures and dynamics. We discuss the physical conditions in radio galaxies, their fuelling and accretion modes, host galaxies and large-scale environments, and the role(s) they play as engines of feedback in the process of galaxy evolution. Finally

    更新日期:2020-07-31
  • SS433: A massive X-ray binary in an advanced evolutionary stage
    New Astron. Rev. (IF 4.2) Pub Date : 2020-07-31
    Anatol Cherepashchuk, Konstantin Postnov, Sergey Molkov, Eleonora Antokhina, Alexander Belinski

    INTEGRAL IBIS/ISGRI 18–60 keV observations of SS433 performed in 2003–2011 enabled for the first time the hard X-ray phase-resolved orbital and precessional light curves and spectra to be constructed. The spectra can be fitted by a power-law with photon index ≃ 3.8 and remain almost constant while the X-ray flux varies by a factor of a few. This suggests that the hard X-ray emission in SS433 is produced

    更新日期:2020-07-31
  • Jets from Tidal Disruption Events
    New Astron. Rev. (IF 4.2) Pub Date : 2020-07-31
    Fabio De Colle, Wenbin Lu

    The discovery of jets from tidal disruption events (TDEs) rejuvenated the old field of relativistic jets powered by accretion onto supermassive black holes. In this Chapter, we first review the extensive multi-wavelength observations of jetted TDEs. Then, we show that these events provide valuable information on many aspects of jet physics from a new prospective, including the on-and-off switch of

    更新日期:2020-07-31
  • Supernovae Ia in 2019 (review): A rising demand for spherical explosions
    New Astron. Rev. (IF 4.2) Pub Date : 2020-05-25
    Noam Soker

    I review new studies of type Ia supernovae (SNe Ia) from 2019, and use these to improve the comparison between the five binary SN Ia scenarios. New low polarisation measurements solidify the claim that most SN Ia explosions are globally spherically symmetric (clumps are possible). Explosions by dynamical processes, like explosions that take place during a merger process of two white dwarfs (WDs) in

    更新日期:2020-05-25
  • Energy-sensitive detectors for astronomy: Past, present and future
    New Astron. Rev. (IF 4.2) Pub Date : 2020-02-27
    E.G.P. O’Connor, A. Shearer, K. O’Brien
    更新日期:2020-02-27
  • A review of quasi-periodic oscillations from black hole X-ray binaries: Observation and theory
    New Astron. Rev. (IF 4.2) Pub Date : 2020-02-14
    Adam R. Ingram, Sara E. Motta

    Black hole and neutron star X-ray binary systems routinely show quasi-periodic oscillations (QPOs) in their X-ray flux. Despite being strong, easily measurable signals, their physical origin has long remained elusive. However, recent observational and theoretical work has greatly improved our understanding. Here, we briefly review the basic phenomenology of the different varieties of QPO in both black

    更新日期:2020-02-14
  • The quest for dual and binary supermassive black holes: A multi-messenger view
    New Astron. Rev. (IF 4.2) Pub Date : 2020-02-11
    Alessandra De Rosa, Cristian Vignali, Tamara Bogdanović, Pedro R. Capelo, Maria Charisi, Massimo Dotti, Bernd Husemann, Elisabeta Lusso, Lucio Mayer, Zsolt Paragi, Jessie Runnoe, Alberto Sesana, Lisa Steinborn, Stefano Bianchi, Monica Colpi, Luciano del Valle, Sándor Frey, Krisztina É. Gabányi, Marta Volonteri

    The quest for binary and dual supermassive black holes (SMBHs) at the dawn of the multi-messenger era is compelling. Detecting dual active galactic nuclei (AGN) – active SMBHs at projected separations larger than several parsecs – and binary AGN – probing the scale where SMBHs are bound in a Keplerian binary – is an observational challenge. The study of AGN pairs (either dual or binary) also represents

    更新日期:2020-02-11
  • Surviving companions of Type Ia supernovae: theory and observations
    New Astron. Rev. (IF 4.2) Pub Date : 2019-12-17
    Pilar Ruiz–Lapuente

    We review the theoretical background and the observational searches made for surviving companions of Type Ia supernovae (SNe Ia). Theory comprises the characteristics of the stellar binary companions of the exploding white dwarfs at the time of the supernova outburst and the expected effects on them of the explosion, as well as their subsequent evolution. That includes space velocities, rotation, luminosities

    更新日期:2019-12-17
  • How to find a planet from transit variations
    New Astron. Rev. (IF 4.2) Pub Date : 2019-07-01
    David Nesvorný

    Here we describe the story behind the discovery of Kepler-46, which was the first exoplanetary system detected and characterized from a method known as the transit timing variations (TTVs). The TTV method relies on the gravitational interaction between planets orbiting the same star. If transits of at least one of the planets are detected, precise measurements of its transit times can be used, at least

    更新日期:2019-07-01
  • Kepler-9: The first multi-transiting system and the first transit timing variations
    New Astron. Rev. (IF 4.2) Pub Date : 2019-05-13
    Darin Ragozzine, Matthew J. Holman

    Kepler-9, discovered by Holman et al. (2010), was the first system with multiple confirmed transiting planets and the first system to clearly show long-anticipated transit timing variations (TTVs). It was the first major novel exoplanet discovery of the Kepler Space Telescope mission. The Kepler pipeline identified two Saturn-radius candidates (called Kepler Objects of Interest or KOIs): KOI-377.01

    更新日期:2019-05-13
  • Discovery of the first Earth-sized planets orbiting a star other than our Sun in the Kepler-20 system
    New Astron. Rev. (IF 4.2) Pub Date : 2019-05-13
    Guillermo Torres, François Fressin

    Discovering other worlds the size of our own has been a long-held dream of astronomers. The transiting planets Kepler-20 e and Kepler-20 f, which belong to a multi-planet system, hold a very special place among the many groundbreaking discoveries of the Kepler mission because they finally realized that dream. The radius of Kepler-20 f is essentially identical to that of the Earth, while Kepler-20 e

    更新日期:2019-05-13
  • Discovery and characterization of Kepler-36b
    New Astron. Rev. (IF 4.2) Pub Date : 2019-05-13
    Eric Agol, Joshua A. Carter

    We describe the circumstances that led to the discovery of Kepler-36b, and the subsequent characterization of its host planetary system. The Kepler-36 system is remarkable for its physical properties: the close separation of the planets, the contrasting densities of the planets despite their proximity, and the short chaotic timescale. Its discovery and characterization was also remarkable for the novelty

    更新日期:2019-05-13
  • Kepler-62f: Kepler's first small planet in the habitable zone, but is it real?
    New Astron. Rev. (IF 4.2) Pub Date : 2019-05-13
    William Borucki, Susan E. Thompson, Eric Agol, Christina Hedges

    Kepler-62f is the first exoplanet small enough to plausibly have a rocky composition orbiting within the habitable zone (HZ) discovered by the Kepler Mission. The planet is 1.4 times the size of the Earth and has an orbital period of 267 days. At the time of its discovery, it had the longest period of any small planet in the habitable zone of a multi-planet system. Because of its long period, only

    更新日期:2019-05-13
  • Kepler-78 and the Ultra-Short-Period planets
    New Astron. Rev. (IF 4.2) Pub Date : 2019-05-13
    Joshua N. Winn, Roberto Sanchis-Ojeda, Saul Rappaport

    Compared to the Earth, the exoplanet Kepler-78b has a similar size (1.2 R⊕) and an orbital period a thousand times shorter (8.5 h). It is currently the smallest planet for which the mass, radius, and dayside brightness have all been measured. Kepler-78b is an exemplar of the ultra-short-period (USP) planets, a category defined by the simple criterion Porb < 1 day. We describe our Fourier-based search

    更新日期:2019-05-13
  • The discovery and legacy of Kepler’s multi-transiting planetary systems
    New Astron. Rev. (IF 4.2) Pub Date : 2019-05-10
    Jason H. Steffen, Jack J. Lissauer

    We revisit the discovery and implications of the first candidate systems to contain multiple transiting exoplanets. These systems were discovered using data from the Kepler space telescope. The initial paper, presenting five systems (Steffen et al., 2010a), was posted online at the time the project released the first catalog of Kepler planet candidates. The first extensive analysis of the observed

    更新日期:2019-05-10
  • The discovery of “Tatooine”: Kepler-16b
    New Astron. Rev. (IF 4.2) Pub Date : 2019-05-08
    Laurance R. Doyle

    We describe the discovery of Kepler-16b, the first widely accepted detection of a circumbinary planet.

    更新日期:2019-05-08
  • Synthetic observations of star formation and the interstellar medium
    New Astron. Rev. (IF 4.2) Pub Date : 2018-06-30
    Thomas J. Haworth, Simon C.O. Glover, Christine M. Koepferl, Thomas G. Bisbas, James E. Dale

    Synthetic observations are playing an increasingly important role across astrophysics, both for interpreting real observations and also for making meaningful predictions from models. In this review, we provide an overview of methods and tools used for generating, manipulating and analysing synthetic observations and their application to problems involving star formation and the interstellar medium

    更新日期:2018-06-30
  • The terrestrial record of Late Heavy Bombardment
    New Astron. Rev. (IF 4.2) Pub Date : 2018-03-26
    Donald R. Lowe, Gary R. Byerly

    Until recently, the known impact record of the early Solar System lay exclusively on the surfaces of the Moon, Mars, and other bodies where it has not been erased by later weathering, erosion, impact gardening, and/or tectonism. Study of the cratered surfaces of these bodies led to the concept of the Late Heavy Bombardment (LHB), an interval from about 4.1 to 3.8 billion years ago (Ga) during which

    更新日期:2018-03-26
  • Star clusters in evolving galaxies
    New Astron. Rev. (IF 4.2) Pub Date : 2018-03-22
    Florent Renaud

    Their ubiquity and extreme densities make star clusters probes of prime importance of galaxy evolution. Old globular clusters keep imprints of the physical conditions of their assembly in the early Universe, and younger stellar objects, observationally resolved, tell us about the mechanisms at stake in their formation. Yet, we still do not understand the diversity involved: why is star cluster formation

    更新日期:2018-03-22
  • The State-of-Play of Anomalous Microwave Emission (AME) research
    New Astron. Rev. (IF 4.2) Pub Date : 2018-02-23
    Clive Dickinson, Y. Ali-Haïmoud, A. Barr, E.S. Battistelli, A. Bell, L. Bernstein, S. Casassus, K. Cleary, B.T. Draine, R. Génova-Santos, S.E. Harper, B. Hensley, J. Hill-Valler, Thiem Hoang, F.P. Israel, L. Jew, A. Lazarian, J.P. Leahy, Matias Vidal

    Anomalous Microwave Emission (AME) is a component of diffuse Galactic radiation observed at frequencies in the range ≈ 10–60 GHz. AME was first detected in 1996 and recognised as an additional component of emission in 1997. Since then, AME has been observed by a range of experiments and in a variety of environments. AME is spatially correlated with far-IR thermal dust emission but cannot be explained

    更新日期:2018-02-23
  • The science case for simultaneous mm-wavelength receivers in radio astronomy
    New Astron. Rev. (IF 4.2) Pub Date : 2017-09-19
    Richard Dodson, María J. Rioja, Taehyun Jung, José L. Goméz, Valentin Bujarrabal, Luca Moscadelli, James C.A. Miller-Jones, Alexandra J. Tetarenko, Gregory R. Sivakoff

    This review arose from the European Radio Astronomy Technical Forum (ERATec) meeting held in Firenze, October 2015, and aims to highlight the breadth and depth of the high-impact science that will be aided and assisted by the use of simultaneous mm-wavelength receivers. Recent results and opportunities are presented and discussed from the fields of: continuum VLBI (observations of weak sources, astrometry

    更新日期:2017-09-19
  • The Chandra deep fields: Lifting the veil on distant active galactic nuclei and X-ray emitting galaxies
    New Astron. Rev. (IF 4.2) Pub Date : 2017-09-18
    Y.Q. Xue

    The Chandra Deep Fields (CDFs), being a major thrust among extragalactic X-ray surveys and complemented effectively by multiwavelength observations, have critically contributed to our dramatically improved characterization of the 0.5–8 keV cosmic X-ray background sources, the vast majority of which are distant active galactic nuclei (AGNs) and starburst and normal galaxies. In this review, I highlight

    更新日期:2017-09-18
  • Constraining the pitch angle of the galactic spiral arms in the Milky Way
    New Astron. Rev. (IF 4.2) Pub Date : 2017-09-07
    Jacques P. Vallée

    We carry out analyses of some parameters of the galactic spiral arms, in the currently available samples. We present a catalog of the observed pitch angle for each spiral arm in the Milky Way disk. For each long spiral arm in the Milky Way, we investigate for each individual arm its pitch angle, as measured through different methods (parallaxes, twin-tangent arm, kinematical, etc), and assess their

    更新日期:2017-09-07
  • Neutrino-dominated accretion flows as the central engine of gamma-ray bursts
    New Astron. Rev. (IF 4.2) Pub Date : 2017-07-20
    Tong Liu, Wei-Min Gu, Bing Zhang

    Neutrino-dominated accretion flows (NDAFs) around rotating stellar-mass black holes (BHs) are plausible candidates for the central engines of gamma-ray bursts (GRBs). NDAFs are hyperaccretion disks with accretion rates in the range of around 0.001–10 M⊙s−1, which have high density and temperature and therefore are extremely optically thick and geometrically slim or even thick. We review the theoretical

    更新日期:2017-07-20
  • Active galactic nuclei horizons from the gamma-ray perspective
    New Astron. Rev. (IF 4.2) Pub Date : 2017-06-15
    Andrew M. Taylor

    Recent results in the field of high energy active galactic nuclei (AGN) astrophysics, benefiting from improvements to gamma-ray instruments and observational strategies, have revealed a surprising wealth of unexpected phenomena. These developments have been brought about both through observational efforts to discover new very high energy gamma-ray emitters, as well as from further in-depth observations

    更新日期:2017-06-15
  • The formation of stellar black holes
    New Astron. Rev. (IF 4.2) Pub Date : 2017-04-20
    Félix Mirabel

    It is believed that stellar black holes (BHs) can be formed in two different ways: Either a massive star collapses directly into a BH without a supernova (SN) explosion, or an explosion occurs in a proto-neutron star, but the energy is too low to completely unbind the stellar envelope, and a large fraction of it falls back onto the short-lived neutron star (NS), leading to the delayed formation of

    更新日期:2017-04-20
  • Gamma Ray Burst afterglow and prompt-afterglow relations: An overview
    New Astron. Rev. (IF 4.2) Pub Date : 2017-04-08
    M.G. Dainotti, R. Del Vecchio

    The mechanism responsible for the afterglow emission of Gamma Ray Bursts (GRBs) and its connection to the prompt γ-ray emission is still a debated issue. Relations between intrinsic properties of the prompt or afterglow emission can help to discriminate between plausible theoretical models of GRB production. Here we present an overview of the afterglow and prompt-afterglow two parameter relations,

    更新日期:2017-04-08
  • The carriers of the unidentified infrared emission features: Clues from polycyclic aromatic hydrocarbons with aliphatic sidegroups
    New Astron. Rev. (IF 4.2) Pub Date : 2017-01-14
    X.J. Yang, R. Glaser, Aigen Li, J.X. Zhong

    The unidentified infrared emission (UIE) features at 3.3, 6.2, 7.7, 8.6, 11.3 and 12.7 µ m are ubiquitously seen in a wide variety of astrophysical regions in the Milky Way and nearby galaxies as well as distant galaxies at redshifts z ≳ 4. The UIE features are characteristic of the stretching and bending vibrations of aromatic hydrocarbon materials. The 3.3 µ m feature which results from the C–H stretching

    更新日期:2017-01-14
  • High energy polarimetry of prompt GRB emission
    New Astron. Rev. (IF 4.2) Pub Date : 2016-11-29
    Mark L. McConnell

    [Evidence] of polarized γ-ray emission (> 50 keV) from Gamma-Ray Bursts (GRBs) has been accumulated in recent years. Measurements have been reported with levels in the range of 30–80%, typically with limited statistical significance. No clear picture has yet emerged with regards to the polarization properties of GRBs. Taken at face value, the data suggest that most GRBs have a relatively large level

    更新日期:2016-11-29
  • The jet feedback mechanism (JFM) in stars, galaxies and clusters
    New Astron. Rev. (IF 4.2) Pub Date : 2016-08-24
    Noam Soker

    I review the influence jets and the bubbles they inflate might have on their ambient gas as they operate through a negative jet feedback mechanism (JFM). I discuss astrophysical systems where jets are observed to influence the ambient gas, in many cases by inflating large, hot, and low-density bubbles, and systems where the operation of the JFM is still a theoretical suggestion. The first group includes

    更新日期:2016-08-24
  • The white dwarf luminosity function
    New Astron. Rev. (IF 4.2) Pub Date : 2016-08-05
    Enrique García–Berro, Terry D. Oswalt

    White dwarfs are the final remnants of low- and intermediate-mass stars. Their evolution is essentially a cooling process that lasts for ∼ 10 Gyr. Their observed properties provide information about the history of the Galaxy, its dark matter content and a host of other interesting astrophysical problems. Examples of these include an independent determination of the past history of the local star formation

    更新日期:2016-08-05
  • The secondary supernova machine: Gravitational compression, stored Coulomb energy, and SNII displays
    New Astron. Rev. (IF 4.2) Pub Date : 2016-03-18
    Donald D. Clayton, Bradley S. Meyer

    Radioactive power for several delayed optical displays of core-collapse supernovae is commonly described as having been provided by decays of 56Ni nuclei. This review analyses the provenance of that energy more deeply: the form in which that energy is stored; what mechanical work causes its storage; what conservation laws demand that it be stored; and why its release is fortuitously delayed for about

    更新日期:2016-03-18
  • Circumstellar debris and pollution at white dwarf stars
    New Astron. Rev. (IF 4.2) Pub Date : 2016-03-12
    J. Farihi

    Circumstellar disks of planetary debris are now known or suspected to closely orbit hundreds of white dwarf stars. To date, both data and theory support disks that are entirely contained within the preceding giant stellar radii, and hence must have been produced during the white dwarf phase. This picture is strengthened by the signature of material falling onto the pristine stellar surfaces; disks

    更新日期:2016-03-12
  • A critical review of period analyses and implications for mass exchange in W UMa eclipsing binaries: Paper 3
    New Astron. Rev. (IF 4.2) Pub Date : 2016-02-20
    R.H. Nelson, D. Terrell, E.F. Milone

    This is the third of a series of four papers, the goal of which is to identify the overcontact eclipsing binary star systems for which a solid case can be made for mass exchange. To reach this goal, it is necessary first to identify those systems for which there is a strong case for period change. We have identified 60 candidate systems; in the first two papers (Nelson et al., 2014, Nelson et al.,

    更新日期:2016-02-20
  • A critical review of period analyses and implications for mass exchange in W UMa eclipsing binaries: Part 2
    New Astron. Rev. (IF 4.2) Pub Date : 2015-10-09
    R.H. Nelson, D. Terrell, E.F. Milone

    This is the second of a series of four papers, the goal of which is to identify the overcontact eclipsing binary star systems for which a solid case can be made for mass exchange. To reach this goal, it is necessary first to identify those systems for which there is a strong case for period change. We have identified 60 candidate systems; in the first paper (Nelson et al., 2014) we discussed 20 individual

    更新日期:2015-10-09
  • The modelling of feedback in star formation simulations
    New Astron. Rev. (IF 4.2) Pub Date : 2015-08-04
    James E. Dale

    I review the current state of numerical simulations of stellar feedback in the context of star formation at scales ranging from the formation of individual stars to models of galaxy formation including cosmic reionisation. I survey the wealth of algorithms developed recently to solve the radiative transfer problem and to simulate stellar winds, supernovae and protostellar jets. I discuss the results

    更新日期:2015-08-04
  • Radio frequency interference in solar monitoring using CALLISTO
    New Astron. Rev. (IF 4.2) Pub Date : 2015-05-16
    Zamri Zainal Abidin, Norsuzian Mohd Anim, Zety Sharizat Hamidi, Christian Monstein, Zainol Abidin Ibrahim, Roslan Umar, Nur Nafhatun Md Shariff, Nabilah Ramli, Noor Aqma Iryani Aziz, Indriani Sukma

    Compact Astronomical Low-frequency, Low-cost Instrument for Spectroscopy in Transportable Observatories (CALLISTO) is a global network of spectrometer system with the purpose to observe the Sun's activities. There are 37 stations (using 68 instruments) forming this network from more than 96 countries. We investigate the radio frequency interference (RFI) affecting CALLISTO at these stations. We found

    更新日期:2015-05-16
  • Gamma-ray burst cosmology
    New Astron. Rev. (IF 4.2) Pub Date : 2015-04-23
    F.Y. Wang, Z.G. Dai, E.W. Liang

    Gamma-ray bursts (GRBs) are the most luminous electromagnetic explosions in the Universe, which emit up to 8.8 × 1054 erg isotropic equivalent energy in the hard X-ray band. The high luminosity makes them detectable out to the largest distances yet explored in the Universe. GRBs, as bright beacons in the deep Universe, would be the ideal tool to probe the properties of high-redshift universe: including

    更新日期:2015-04-23
  • Formation of black hole low-mass X-ray binaries
    New Astron. Rev. (IF 4.2) Pub Date : 2015-03-14
    Xiang-Dong Li

    The majority of known Galactic black holes reside in low-mass X-ray binaries. They are rare and fascinating objects, providing unique information on strong gravity, accretion disc physics, and stellar and binary evolution. There is no doubt that our understanding of the formation of black hole low-mass X-ray binaries has significantly advanced in the past decade. However, some key issues are still

    更新日期:2015-03-14
  • New approaches to SNe Ia progenitors
    New Astron. Rev. (IF 4.2) Pub Date : 2014-09-28
    Pilar Ruiz-Lapuente

    Although Type Ia supernovae (SNe Ia) are a major tool in cosmology and play a key role in the chemical evolution of galaxies, the nature of their progenitor systems (apart from the fact that they must content at least one white dwarf, that explodes) remains largely unknown. In the last decade, considerable efforts have been made, both observationally and theoretically, to solve this problem. Observations

    更新日期:2014-09-28
  • What Regulates Galaxy Evolution? Open questions in our understanding of galaxy formation and evolution
    New Astron. Rev. (IF 4.2) Pub Date : 2014-08-16
    Gabriella De Lucia, Adam Muzzin, Simone Weinmann

    In April 2013, a workshop entitled “What Regulates Galaxy Evolution?” was held at the Lorentz Center. The aim of the workshop was to bring together the observational and theoretical community working on galaxy evolution, and to discuss in depth of the current problems in the subject, as well as to review the most recent observational constraints. A total of 42 astrophysicists attended the workshop

    更新日期:2014-08-16
  • Empirical tests of pre-main-sequence stellar evolution models with eclipsing binaries
    New Astron. Rev. (IF 4.2) Pub Date : 2014-07-29
    Keivan G. Stassun, Gregory A. Feiden, Guillermo Torres

    We examine the performance of standard pre-main-sequence (PMS) stellar evolution models against the accurately measured properties of a benchmark sample of 26 PMS stars in 13 eclipsing binary (EB) systems having masses 0.04–4.0 M⊙ and nominal ages ≈1–20 Myr. We provide a definitive compilation of all fundamental properties for the EBs, with a careful and consistent reassessment of observational uncertainties

    更新日期:2014-07-29
  • A critical review of period analyses and implications for mass exchange in W UMa Eclipsing Binaries: Paper 1
    New Astron. Rev. (IF 4.2) Pub Date : 2014-02-01
    R.H. Nelson, Dirk Terrell, E.F. Milone

    This is the first of a series of four papers, the goal of which is to identify the overcontact eclipsing binary star systems for which a solid case can be made for mass exchange. To reach this goal, it is necessary first to identify those systems for which there is a strong case for period change. We have identified 60 candidate systems; in the present paper and in two succeeding papers we will discuss

    更新日期:2014-02-01
  • Dark matter in the Local Universe
    New Astron. Rev. (IF 4.2) Pub Date : 2013-12-08
    Gustavo Yepes, Stefan Gottlöber, Yehuda Hoffman

    We review how dark matter is distributed in our local neighbourhood from an observational and theoretical perspective. We will start by describing first the dark matter halo of our own galaxy and in the Local Group. Then we proceed to describe the dark matter distribution in the more extended area known as the Local Universe. Depending on the nature of dark matter, numerical simulations predict different

    更新日期:2013-12-08
  • A complete reference of the analytical synchrotron external shock models of gamma-ray bursts
    New Astron. Rev. (IF 4.2) Pub Date : 2013-10-18
    He Gao, Wei-Hua Lei, Yuan-Chuan Zou, Xue-Feng Wu, Bing Zhang

    Gamma-ray bursts are most luminous explosions in the universe. Their ejecta are believed to move towards Earth with a relativistic speed. The interaction between this “relativistic jet” and a circumburst medium drives a pair of (forward and reverse) shocks. The electrons accelerated in these shocks radiate synchrotron emission to power the broad-band afterglow of GRBs. The external shock theory is

    更新日期:2013-10-18
  • The stochastic nature of stellar population modelling
    New Astron. Rev. (IF 4.2) Pub Date : 2013-09-24
    Miguel Cerviño

    Since the early 1970s, stellar population modelling has been one of the basic tools for understanding the physics of unresolved systems from observation of their integrated light. Models allow us to relate the integrated spectra (or colours) of a system with the evolutionary status of the stars of which it is composed and hence to infer how the system has evolved from its formation to its present stage

    更新日期:2013-09-24
  • Dynamics for galactic archaeology
    New Astron. Rev. (IF 4.2) Pub Date : 2013-09-02
    James Binney

    Our Galaxy is a complex machine in which several processes operate simultaneously: metal-poor gas is accreted, is chemically enriched by dying stars, and then drifts inwards, surrendering its angular momentum to stars; new stars are formed on nearly circular orbits in the equatorial plane and then diffuse through orbit space to eccentric and inclined orbits; the central stellar bar surrenders angular

    更新日期:2013-09-02
  • Galactic Archaeology: The dwarfs that survived and perished
    New Astron. Rev. (IF 4.2) Pub Date : 2013-08-02
    Vasily Belokurov

    From the archaeological point of view, the local dwarf galaxies are unique objects in which the imprint of the conditions that shaped the early structure formation can be studied today at high resolution. Over the last decade, this new window into the high redshift Universe has started to be exploited using deep wide-field imaging, high resolution spectroscopy and cutting edge N-body and hydro-dynamical

    更新日期:2013-08-02
  • Elemental abundances in the Milky Way stellar disk(s), bulge, and halo
    New Astron. Rev. (IF 4.2) Pub Date : 2013-07-08
    Sofia Feltzing, Masashi Chiba

    We present a review of elemental abundances in the Milky Way stellar disk, bulge, and halo with a focus on data derived from high-resolution stellar spectra. These data are fundamental in disentangling the formation history and subsequent evolution of the Milky Way. Information from such data is still limited and confined to narrowly defined stellar samples. The astrometric Gaia satellite will soon

    更新日期:2013-07-08
  • Internal kinematics and dynamical models of dwarf spheroidal galaxies around the Milky Way
    New Astron. Rev. (IF 4.2) Pub Date : 2013-06-12
    Giuseppina Battaglia, Amina Helmi, Maarten Breddels

    We review our current understanding of the internal dynamical properties of the dwarf spheroidal galaxies surrounding the Milky Way. These are the most dark matter dominated galaxies, and as such may be considered ideal laboratories to test the current concordance cosmological model, and in particular provide constraints on the nature of the dominant form of dark matter. We discuss the latest observations

    更新日期:2013-06-12
  • Massive stars in the galaxies of the Local Group
    New Astron. Rev. (IF 4.2) Pub Date : 2013-06-12
    Philip Massey

    The star-forming galaxies of the Local Group act as our laboratories for testing massive star evolutionary models. In this review, I briefly summarize what we believe we know about massive star evolution, and the connection between OB stars, Luminous Blue Variables, yellow supergiants, red supergiants, and Wolf–Rayet stars. The difficulties and recent successes in identifying these various types of

    更新日期:2013-06-12
  • A systematic review of strong gravitational lens modeling software
    New Astron. Rev. (IF 4.2) Pub Date : 2013-05-27
    Alan T. Lefor, Toshifumi Futamase, Mohammad Akhlaghi

    Despite expanding research activity in gravitational lens modeling, there is no particular software which is considered a standard. Much of the gravitational lens modeling software is written by individual investigators for their own use. Some gravitational lens modeling software is freely available for download but is widely variable with regard to ease of use and quality of documentation. This review

    更新日期:2013-05-27
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