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Progress in multi-messenger observations and emission models of blazars New Astron. Rev. (IF 6.0) Pub Date : 2023-12-29 Gang Cao, Xiongfei Geng, Jiancheng Wang, Xiongbang Yang
The recent hint of correlated γ-ray and neutrino emission from the blazar TXS 0506+056 has renewed interest in blazars as the source of high-energy neutrinos, in which the possible neutrino emission involved hadronic acceleration in the jet of blazars. In this review, we summarize the recent advances in the multi-wavelength and neutrino observations of blazars. We focus on the discussion of the current
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Advances on the morphological classification of radio galaxies: A review New Astron. Rev. (IF 6.0) Pub Date : 2023-10-12 Steven Ndung’u, Trienko Grobler, Stefan J. Wijnholds, Dimka Karastoyanova, George Azzopardi
Modern radio telescopes will generate, on a daily basis, data sets on the scale of exabytes for systems like the Square Kilometre Array (SKA). Massive data sets are a source of unknown and rare astrophysical phenomena that lead to discoveries. Nonetheless, this is only plausible with the exploitation of machine learning to complement human-aided and traditional statistical techniques. Recently, there
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A critical review of period analyses and implications for mass exchange in W UMa eclipsing binaries: Paper 4 New Astron. Rev. (IF 6.0) Pub Date : 2023-08-14 R.H. Nelson, D. Terrell, E.F. Milone
This is the fourth paper in the series of analyses of times of minimum and period variations in W UMa eclipsing binaries, and the implications for mass exchange in these systems. In this paper, the systems discussed in Papers 1–3 for which analyses are relatively complete are sorted into three sections, arranged in order of degree of confidence that mass exchange occurrence is established and that
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Rational ignorance in the search for extra-terrestrial life New Astron. Rev. (IF 6.0) Pub Date : 2023-04-16 Edward D. Zanders
The question “are we alone in the universe?” has been asked through the ages and is beginning to be addressed by deploying spacecraft and advanced observatories capable of detecting biological signatures. Apart from the certainty that life exists on the Earth, there is no clear evidence at the time of writing for extra-terrestrial life (also termed exo-life). Although the sheer number of potentially
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Empirical constraints on turbulence in proto-planetary discs New Astron. Rev. (IF 6.0) Pub Date : 2023-02-10 Giovanni P. Rosotti
Proto-planetary discs, the birth environment of planets, are an example of a structure commonly found in astrophysics, accretion discs. Identifying the mechanism responsible for accretion is a long-standing problem, dating back several decades. The common picture is that accretion is a consequence of turbulence, with several instabilities proposed for its origin. While traditionally this field used
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Review of latest advances on dark matter from the viewpoint of the Occam razor principle New Astron. Rev. (IF 6.0) Pub Date : 2023-01-24 Eugene Oks
The overwhelming majority of theories on dark matter either introduce exotic, never discovered experimentally subatomic particles or change the physical laws. In this brief review I discuss three theories that do not do this, so that they are preferable from the viewpoint of the Occam razor principle.
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Ultraluminous X-ray sources New Astron. Rev. (IF 6.0) Pub Date : 2023-01-07 Andrew King, Jean-Pierre Lasota, Matthew Middleton
The study of ultraluminous X-ray sources (ULXs) has changed dramatically over the last decade. In this review we first describe the most important observations of ULXs in various wavebands, and across multiple scales in space and time. We discuss recent progress and current unanswered questions. We consider the range of current theories of ULX properties in the light of this observational progress
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New nomenclature rules for meteor showers adopted New Astron. Rev. (IF 6.0) Pub Date : 2022-12-21 Tadeusz J. Jopek, Mária Hajduková, Regina Rudawska, Masahiro Koseki, Gulchehra Kokhirova, Luboš Neslušan
The Shower Database (SD) of the Meteor Data Center (MDC) had been operating on the basis of stream-naming rules which were too complex and insufficiently precise for 15 years. With a gradual increase in the number of discovered meteor showers, the procedure for submitting new showers to the database and naming them led to situations that were inconsistent with the fundamental role of the SD — the disambiguation
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Data analysis techniques in light pollution: A survey and taxonomy New Astron. Rev. (IF 6.0) Pub Date : 2022-10-01 Lala Septem Riza, Ahmad Izzuddin, Judhistira Aria Utama, Khyrina Airin Fariza Abu Samah, Dhani Herdiwijaya, Taufiq Hidayat, Rinto Anugraha, Emanuel Sungging Mumpuni
One of the most pressing issues facing astronomy today is the growing threat of light pollution. Light pollution affects not only astronomical observations but also sustainability in the social and environmental sense. Light pollution has been reported to cause environmental changes by altering the circadian rhythm of organisms such as birds. In this work, we conducted a systematic review of data analyses
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Relativistic models for anisotropic compact stars: A review New Astron. Rev. (IF 6.0) Pub Date : 2022-09-12 Jitendra Kumar, Puja Bharti
The Einstein–Maxwell (or Einstein) system of field equations plays a substantial role in the modeling of compact stars. Although due to its non-linearity getting an exact solution for the system of field equations is a difficult task, the solutions of field equations have a long and rich history. It took a year for Karl Schwarzschild to obtain the first exact solution of Einstein’s field equations
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Persistent mysteries of jet engines, formation, propagation, and particle acceleration: Have they been addressed experimentally? New Astron. Rev. (IF 6.0) Pub Date : 2022-06-30 Eric G. Blackman, Sergey V. Lebedev
The physics of astrophysical jets can be divided into three regimes: (i) engine and launch (ii) propagation and collimation, (iii) dissipation and particle acceleration. Since astrophysical jets comprise a huge range of scales and phenomena, practicality dictates that most studies of jets intentionally or inadvertently focus on one of these regimes, and even therein, one body of work may be simply
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Challenges for ΛCDM: An update New Astron. Rev. (IF 6.0) Pub Date : 2022-06-27 L. Perivolaropoulos, F. Skara
A number of challenges to the standard ΛCDM model have been emerging during the past few years as the accuracy of cosmological observations improves. In this review we discuss in a unified manner many existing signals in cosmological and astrophysical data that appear to be in some tension (2σ or larger) with the standard ΛCDM model as specified by the Cosmological Principle, General Relativity and
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Black holes at cosmic dawn in the redshifted 21cm signal of HI New Astron. Rev. (IF 6.0) Pub Date : 2022-03-26 I.F. Mirabel, L.F. Rodríguez
The first stars (Pop III stars) and Black Holes (BHs) formed in galaxies at Cosmic Dawn (CD) have not been observed and remain poorly constrained. Theoretical models predict that indirect insights of those Pop III stars and BHs could be imprinted as an absorption signal in the 21cm line of the atomic hydrogen (HI) in the cold Intergalactic Medium (IGM), against the Cosmic Microwave Background (CMB)
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The IAU working definition of an exoplanet New Astron. Rev. (IF 6.0) Pub Date : 2022-02-22 A. Lecavelier des Etangs, Jack J. Lissauer
In antiquity, all of the enduring celestial bodies that were seen to move relative to the background sky of stars were considered planets. During the Copernican revolution, this definition was altered to objects orbiting around the Sun, removing the Sun and Moon but adding the Earth to the list of known planets. The concept of planet is thus not simply a question of nature, origin, composition, mass
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Fifteen-plus years of INTEGRAL science New Astron. Rev. (IF 6.0) Pub Date : 2021-12-01 Edward P․J․ van den Heuvel,Guillaume Bélanger,Lorraine Hanlon,Erik Kuulkers
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Brief review of recent advances in understanding dark matter and dark energy New Astron. Rev. (IF 6.0) Pub Date : 2021-10-15 Eugene Oks
Dark sector, constituting about 95% of the Universe, remains the subject of numerous studies. There are lots of models dealing with the cause of the effects assigned to “dark matter” and “dark energy”. This brief review is devoted to the very recent theoretical advances in these areas: only to the advances achieved in the last few years. For example, in section devoted to particle dark matter we overview
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Evolutionary relations between different types of magnetized compact objects New Astron. Rev. (IF 6.0) Pub Date : 2021-10-08 Vladimir Lipunov, Valeria Grinshpun, Daniil Vlasenko
The numerous compact sources associated with neutron stars and white dwarfs discovered in recent decades are analyzed in terms of the Gravimagnetic Rotator model (GMR paradigm–Lipunov, 1987a, 1992). We offer the instrument for understanding of various observed features and evolutionary relationships of neutron stars and white dwarfs. We depict in a single diagram all objects from radio pulsars and
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The episodic and multiscale Galactic Centre New Astron. Rev. (IF 6.0) Pub Date : 2021-09-23 Aaron Bryant, Alfred Krabbe
Within the central few hundred parsecs of the Milky Way, extending from longitude l = −1° to 1.5°, lies the Central Molecular Zone of the Galactic Centre. This extraordinary region is defined by a diverse variety of ISM features in numerous stages of evolution. Molecular cloud H2 volume densities range from 103-8 cm−3 with an average of 104 cm−3, two orders of magnitude above that of the galactic disk
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INTEGRAL reloaded: Spacecraft, instruments and ground system New Astron. Rev. (IF 6.0) Pub Date : 2021-06-24 Erik Kuulkers, Carlo Ferrigno, Peter Kretschmar, Julia Alfonso-Garzón, Marius Baab, Angela Bazzano, Guillaume Bélanger, Ian Benson, Antony J. Bird, Enrico Bozzo, Søren Brandt, Elliott Coe, Isabel Caballero, Floriane Cangemi, Jérôme Chenevez, Bradley Cenko, Nebil Cinar, Alexis Coleiro, Ugo Zannoni
The European Space Agency’s INTErnational Gamma-Ray Astrophysics Laboratory (ESA/INTEGRAL) was launched aboard a Proton-DM2 rocket on 17 October 2002 at 06:41 CEST, from Baikonur in Kazakhstan. Since then, INTEGRAL has been providing long, uninterrupted observations (up to about 47 h, or 170 ksec, per satellite orbit of 2.7 days) with a large field-of-view (FOV, fully coded: 100 deg2), millisecond
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The INTEGRAL view on black hole X-ray binaries New Astron. Rev. (IF 6.0) Pub Date : 2021-05-27 S.E. Motta, J. Rodriguez, E. Jourdain, M. Del Santo, G. Belanger, F. Cangemi, V. Grinberg, J.J.E. Kajava, E. Kuulkers, J. Malzac, K. Pottschmidt, J.P. Roques, C. Sánchez-Fernández, J. Wilms
INTEGRAL is an ESA mission in fundamental astrophysics that was launched in October 2002. It has been in orbit for over 18 years, during which it has been observing the high-energy sky with a set of instruments specifically designed to probe the emission from hard X-ray and soft γ-ray sources. This paper is devoted to the subject of black hole binaries, which are among the most important sources that
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INTEGRAL serendipitous observations of solar and terrestrial X-rays and gamma rays New Astron. Rev. (IF 6.0) Pub Date : 2021-05-11 Marc Türler, Vincent Tatischeff, Volker Beckmann, Eugene Churazov
ESA’s INTEGRAL space mission has achieved unique results for solar and terrestrial physics, although spacecraft operations nominally excluded the possibility to point at the Sun or the Earth. The Earth avoidance was, however, exceptionally relaxed for special occultation observations of the Cosmic X-ray Background (CXB), which on some occasions allowed the detection of strong X-ray auroral emission
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15 years of galactic surveys and hard X-ray background measurements New Astron. Rev. (IF 6.0) Pub Date : 2021-06-01 Roman A. Krivonos, Antony J. Bird, Eugene M. Churazov, John A. Tomsick, Angela Bazzano, Volker Beckmann, Guillaume Bélanger, Arash Bodaghee, Sylvain Chaty, Erik Kuulkers, Alexander Lutovinov, Angela Malizia, Nicola Masetti, Ilya A. Mereminskiy, Rashid Sunyaev, Sergey S. Tsygankov, Pietro Ubertini, Christoph Winkler
The INTEGRAL hard X-ray surveys have proven to be of fundamental importance. INTEGRAL has mapped the Galactic plane with its large field of view and excellent sensitivity. Such hard X-ray snapshots of the whole Milky Way on a time scale of a year are beyond the capabilities of past and current narrow-FOV grazing incidence X-ray telescopes. By expanding the INTEGRAL X-ray survey into shorter timescales
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Steady-state nucleosynthesis throughout the Galaxy New Astron. Rev. (IF 6.0) Pub Date : 2021-06-01 Roland Diehl, Martin G.H. Krause, Karsten Kretschmer, Michael Lang, Moritz M.M. Pleintinger, Thomas Siegert, Wei Wang, Laurent Bouchet, Pierrick Martin
Measurement and astrophysical interpretation of characteristic gamma-ray lines from nucleosynthesis was one of the prominent science goals of the INTEGRAL mission and in particular its spectrometer SPI. Emission from 26Al and from 60Fe decay lines originates from accumulated ejecta of nucleosynthesis sources, and appears diffuse in nature. 26Al and 60Fe are believed to originate mostly from massive
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Multi-messenger astronomy with INTEGRAL New Astron. Rev. (IF 6.0) Pub Date : 2021-06-01 Carlo Ferrigno, Volodymyr Savchenko, Alexis Coleiro, Francesca Panessa, Angela Bazzano, Enrico Bozzo, Jérôme Chenevez, Albert Domingo, Maeve Doyle, Andrea Goldwurm, Diego Götz, Elisabeth Jourdain, Andreas von Kienlin, Erik Kuulkers, Sandro Mereghetti, Antonio Martin-Carrillo, Lorenzo Natalucci, Francesca Onori, James Rodi, Jean-Pierre Roques, Celia Sánchez-Fernández, Pietro Ubertini
At the time of defining the science objectives of the INTernational Gamma-Ray Astrophysics Laboratory (INTEGRAL), such a rapid and spectacular development of multi-messenger astronomy could not have been predicted, with new impulsive phenomena becoming accessible through different channels. Neutrino telescopes have routinely detected energetic neutrino events coming from unknown cosmic sources since
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Synthesis of radioactive elements in novae and supernovae and their use as a diagnostic tool New Astron. Rev. (IF 6.0) Pub Date : 2021-06-01 J. Isern, M. Hernanz, E. Bravo, S. Grebenev, P. Jean, M. Renaud, T. Siegert, J. Vink
Abstract Novae and supernovae play a key role in many fields of Astrophysics and Cosmology. Despite their importance, an accurate description of which objects explode and why and how they explode is still lacking. One of the main characteristics of such explosions is that they are the main suppliers of newly synthesized chemical elements in the Galaxy. Since some of these isotopes are radioactive,
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Critical review of chirality indicators of extraterrestrial life New Astron. Rev. (IF 6.0) Pub Date : 2021-06-01 David Avnir
Abstract The major revolution in modern astronomy recognizing the universe as teeming with exoplanets, the discovery of liquid water in solar moons, and the continuing focus on Mars exploration, all accelerate the re-evaluation of potential biomarkers for extraterrestrial life. Based on life on planet Earth which relies heavily on chiral molecules and especially on homochiral families, the detection
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Jets from young stars New Astron. Rev. (IF 6.0) Pub Date : 2021-04-15 T.P. Ray, J. Ferreira
Jets are ubiquitous in the Universe and are seen from a large number of astrophysical objects including active galactic nuclei, gamma ray bursters, micro-quasars, proto-planetary nebulae, young stars and even brown dwarfs. In every case they seem to be accompanied by an accretion disk and, while the detailed physics may change, it has been suggested that the same basic mechanism is responsible for
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Gamma-ray burst jets in supernovae New Astron. Rev. (IF 6.0) Pub Date : 2021-04-17 Alessandra Corsi, Davide Lazzati
We review the current observational status and theoretical interpretations for the class of broad lines type Ic supernovae. They are characterized by fast photospheric expansion and lack of H and He absorption. They have a larger than normal energy budget, suggesting that they are powered or, at least, augmented by a central engine, like a magnetar or an accreting black hole. There appears therefore
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Numerical simulations of jets New Astron. Rev. (IF 6.0) Pub Date : 2021-01-23 Serguei Komissarov, Oliver Porth
When astrophysical jets were discovered one hundred years ago, the field of numerical simulations did not yet exit. Since the arrival of programmable computers though, numerical simulations have increasingly become an indispensable tool for dealing with “tough nut” problems which involve complex dynamic and non-linear phenomena. Astrophysical jets are an ideal example of such a tough nut, where multi-scale
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INTEGRAL View on cataclysmic variables and symbiotic binaries New Astron. Rev. (IF 6.0) Pub Date : 2020-12-01 Alexander Lutovinov, Valery Suleimanov, Gerardo Juan Manuel Luna, Sergey Sazonov, Domitilla de Martino, Lorenzo Ducci, Victor Doroshenko, Maurizio Falanga
Accreting white dwarfs (WDs) constitute a significant fraction of the hard X-ray sources detected by the INTEGRAL observatory. Most of them are magnetic Cataclysmic Variables (CVs) of the intermediate polar (IP) and polar types, but the contribution of the Nova-likes systems and the systems with optically thin boundary layers, Dwarf Novae (DNs) and Symbiotic Binaries (or Symbiotic Stars, SySs) in quiescence
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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 6.0) Pub Date : 2020-12-01 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, P. Laurent, J. Li, Z. Li, T. Mineo, P. Moran, A. Neronov, A. Paizis, N. Rea, A. Riggio, A. Sanna, V. Savchenko, A. Słowikowska, A. Shearer, A. Tiengo, D.F. Torres
Abstract 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
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OB Associations and their origins New Astron. Rev. (IF 6.0) Pub Date : 2020-11-01 Nicholas J. Wright
OB associations are unbound groups of young stars made prominent by their bright OB members, and have long been thought to be the expanded remnants of dense star clusters. They have been important in astrophysics for over a century thanks to their luminous massive stars, though their low-mass members have not been well studied until the last couple of decades. This has changed thanks to data from X-ray
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INTEGRAL view of AGN New Astron. Rev. (IF 6.0) Pub Date : 2020-11-01 Angela Malizia, Sergey Sazonov, Loredana Bassani, Elena Pian, Volker Beckmann, Manuela Molina, Ilya Mereminskiy, Guillaume Belanger
AGN are among the most energetic phenomena in the Universe and in the last two decades INTEGRAL's contribution in their study has had a significant impact. Thanks to the INTEGRAL extragalactic sky surveys, all classes of soft X-ray detected (in the 2-10 keV band) AGN have been observed at higher energies as well. Up to now, around 450 AGN have been catalogued and a conspicuous part of them are either
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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 6.0) Pub Date : 2020-11-01 Eugene Churazov, Laurent Bouchet, Pierre Jean, Elisabeth Jourdain, Jürgen Knödlseder, Roman Krivonos, Jean-Pierre Roques, Sergey Sazonov, Thomas Siegert, Andrew Strong, Rashid Sunyaev
Abstract 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
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The Case for Jets in Cataclysmic Variables New Astron. Rev. (IF 6.0) Pub Date : 2020-09-01 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
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Particle acceleration in astrophysical jets New Astron. Rev. (IF 6.0) Pub Date : 2020-09-01 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
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SS433: a massive X-ray binary in an advanced evolutionary stage New Astron. Rev. (IF 6.0) Pub Date : 2020-09-01 Anatol Cherepashchuk, Konstantin Postnov, Sergey Molkov, Eleonora Antokhina, Alexander Belinski
Abstract 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
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Jets from Tidal Disruption Events New Astron. Rev. (IF 6.0) Pub Date : 2020-09-01 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
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The Galactic LMXB Population and the Galactic Centre Region New Astron. Rev. (IF 6.0) Pub Date : 2020-06-01 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, E. Kuulkers, N. Lund, C. Sanchez-Fernandez, A. Tarana, P. Ubertini, 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
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Radio galaxies and feedback from AGN jets New Astron. Rev. (IF 6.0) Pub Date : 2020-06-01 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
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The Quest for Dual and Binary Supermassive Black Holes: A Multi-Messenger View New Astron. Rev. (IF 6.0) Pub Date : 2019-12-01 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, Margherita Giustini, Matteo Guainazzi, Zoltan Haiman, Noelia Herrera Ruiz, Rubén Herrero-Illana, Kazushi
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
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Advances in Understanding High-Mass X-ray Binaries with INTEGRALand Future Directions New Astron. Rev. (IF 6.0) Pub Date : 2019-12-01 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, Pere Blay, Isabel Caballero, Malcolm J. Coe, Albert Domingo, Victor Doroshenko
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
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INTEGRAL Results on Gamma-Ray Bursts and Polarization of Hard X-ray Sources New Astron. Rev. (IF 6.0) Pub Date : 2019-12-01 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
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Relativistic Jets of Blazars New Astron. Rev. (IF 6.0) Pub Date : 2019-12-01 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
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Supernovae Ia in 2019 (review): A rising demand for spherical explosions New Astron. Rev. (IF 6.0) Pub Date : 2019-12-01 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
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Energy-sensitive Detectors for Astronomy: Past, Present and Future New Astron. Rev. (IF 6.0) Pub Date : 2019-12-01 E.G.P. O’Connor, A. Shearer, K. O’Brien
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Corrigendum to “Kepler-78 and the Ultra-Short-Period planets” New Astronomy Reviews 83 (2018) 37-48 New Astron. Rev. (IF 6.0) Pub Date : 2019-09-01 Joshua N. Winn,Roberto Sanchis-Ojeda,Saul Rappaport
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Surviving companions of Type Ia supernovae: theory and observations New Astron. Rev. (IF 6.0) Pub Date : 2019-09-01 Pilar Ruiz–Lapuente
Abstract 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
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A review of quasi-periodic oscillations from black hole X-ray binaries: Observation and theory New Astron. Rev. (IF 6.0) Pub Date : 2019-09-01 Adam R. Ingram, Sara E. Motta
Abstract 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
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The Discovery of “Tatooine”: Kepler-16b New Astron. Rev. (IF 6.0) Pub Date : 2019-05-01 Laurance R. Doyle
Abstract We describe the discovery of Kepler-16b, the first widely accepted detection of a circumbinary planet.
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How to find a planet from transit variations New Astron. Rev. (IF 6.0) Pub Date : 2019-05-01 David Nesvorný
Here we describe a 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
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New Astronomy Reviews Special Issue: History of Kepler’s Major Exoplanet “Firsts” New Astron. Rev. (IF 6.0) Pub Date : 2018-11-01 Jack J. Lissauer, Joann Eisberg
NASA's Kepler Mission revolutionized exoplanet science in the early part of the 2010's. Looking back from the perspective of the end of that decade, Kepler appears to have burst upon the scene ready for battle, like Athena springing forth, fully formed, from the head of Zeus. The story was not so simple. Kepler's first major exoplanet discoveries were not announced until more than a year had passed
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Kepler-9: The first multi-transiting system and the first transit timing variations New Astron. Rev. (IF 6.0) Pub Date : 2018-11-01 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). We review the historical circumstances behind the discovery and characterization of these planets and the publication of Holman et al. 2010. It was the first major novel exoplanet discovery of the Kepler Space
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Discovery of the first Earth-sized planets orbiting a star other than our Sun in the Kepler-20 system New Astron. Rev. (IF 6.0) Pub Date : 2018-11-01 Guillermo Torres, François Fressin
Discovering other worlds the size of our own has been a long-held dream of astronomers. The transiting planets Kepler-20e and Kepler-20f, 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-20f is essentially identical to that of the Earth, while Kepler-20e is
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Discovery and characterization of Kepler-36b New Astron. Rev. (IF 6.0) Pub Date : 2018-11-01 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
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Kepler-62f: Kepler's first small planet in the habitable zone, but is it real? New Astron. Rev. (IF 6.0) Pub Date : 2018-11-01 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