A study of compact object mergers as short gamma-ray burst progenitors
Krzysztof Belczynski,Rosalba Perna,Tomasz Bulik,Vicky Kalogera,Natalia Ivanova,Donald Q. Lamb +5 more
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In this article, a theoretical study of double compact objects as potential short/hard gamma-ray burst (GRB) progenitors is presented, and their formation rates, estimate merger times, and finally predict their most likely merger locations and afterglow properties for different types of host galaxies.Abstract:
We present a theoretical study of double compact objects as potential short/hard gamma-ray burst (GRB) progenitors. An updated population synthesis code, StarTrack, is used to calculate properties of double neutron stars and black hole-neutron star binaries. We obtain their formation rates, estimate merger times, and finally predict their most likely merger locations and afterglow properties for different types of host galaxies. Our results serve for a direct comparison with the recent HETE-2 and Swift observations of several short bursts, for which afterglows and host galaxies were detected. We also discuss the possible constraints these observations put on the evolutionary models of double compact object formation. We emphasize that our double compact object models can successfully reproduce at the same time short GRBs within both young, star-forming galaxies (e.g., GRB 050709 and GRB 051221A), as well as within old, elliptical hosts (e.g., GRB 050724 and probably GRB 050509B).read more
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Gravitational Waves and Gamma-Rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
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Spectroscopic identification of r-process nucleosynthesis in a double neutron star merger
Elena Pian,P. D'Avanzo,Stefano Benetti,M. Branchesi,Enzo Brocato,Sergio Campana,Enrico Cappellaro,Stefano Covino,Valerio D'Elia,Johan P. U. Fynbo,Fedor Getman,G. Ghirlanda,Gabriele Ghisellini,A. Grado,G. Greco,Jens Hjorth,Chryssa Kouveliotou,Andrew J. Levan,Luca Limatola,D. Malesani,Paolo A. Mazzali,Paolo A. Mazzali,A. Melandri,Per Møller,Luciano Nicastro,Eliana Palazzi,S. Piranomonte,Andrea Rossi,Om Sharan Salafia,Om Sharan Salafia,Jonatan Selsing,G. Stratta,Masaomi Tanaka,Nial R. Tanvir,L. Tomasella,Darach Watson,Sheng Yang,Sheng Yang,Lorenzo Amati,Louis Antonelli,S. Ascenzi,S. Ascenzi,M. G. Bernardini,M. Boer,F. Bufano,Andrea Bulgarelli,Massimo Capaccioli,Piergiorgio Casella,A. J. Castro-Tirado,E. Chassande-Mottin,Riccardo Ciolfi,Chris M. Copperwheat,M. Dadina,G. De Cesare,A. Di Paola,Yi-Zhong Fan,Bruce Gendre,G. Giuffrida,Antonio Giunta,L. K. Hunt,G. L. Israel,Zhi-Ping Jin,Mansi M. Kasliwal,S. Klose,M. Lisi,Francesco Longo,Elisabetta Maiorano,Michela Mapelli,N. Masetti,N. Masetti,L. Nava,B. Patricelli,Daniel A. Perley,A. Pescalli,A. Pescalli,Tsvi Piran,A. Possenti,L. Pulone,M. Razzano,Ruben Salvaterra,Pietro Schipani,Mario Spera,Antonio Stamerra,Luigi Stella,Gianpiero Tagliaferri,Vincenzo Testa,Eleonora Troja,Massimo Turatto,S. D. Vergani,S. D. Vergani,D. Vergani +90 more
TL;DR: The spectral identification and physical properties of a bright kilonova associated with the gravitational-wave source GW170817 and γ-ray burst GRB 170817A associated with a galaxy at a distance of 40 megaparsecs from Earth are described.
Journal ArticleDOI
First results from the IllustrisTNG simulations: a tale of two elements - chemical evolution of magnesium and europium
Jill Naiman,Annalisa Pillepich,Volker Springel,Enrico Ramirez-Ruiz,Paul Torrey,Mark Vogelsberger,Rüdiger Pakmor,Dylan Nelson,Federico Marinacci,Lars Hernquist,Rainer Weinberger,Shy Genel +11 more
TL;DR: In this article, the authors analyzed the abundance ratios of magnesium and europium in Milky Way-like galaxies from the TNG100 simulation (stellar masses = (M_\star / {\rm M}_\odot) \sim 9.7 -11.2$).
References
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Journal ArticleDOI
An Analytical Model for Spherical Galaxies and Bulges
TL;DR: In this article, a modele de masse for les galaxies elliptiques, which approche la loi R 1/4 de Vaucouleur, is developpe.
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Spectra and light curves of gamma-ray burst afterglows
TL;DR: In this paper, the broadband spectrum and corresponding light curve of synchrotron radiation from a power-law distribution of electrons in an expanding relativistic shock were calculated for the gamma-ray burst afterglow.
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Double white dwarfs as progenitors of R Coronae Borealis stars and type I supernovae
TL;DR: In this article, the authors explored the role of mass transfer in the evolution of double degenerate systems and found that low-mass helium/helium pairs are unstable to dynamical time-scale mass transfer and probably coalesce to form helium-burning sdO stars.
Journal ArticleDOI
Nucleosynthesis, neutrino bursts and gamma-rays from coalescing neutron stars
David Eichler,David Eichler,Mario Livio,Tsvi Piran,Tsvi Piran,David N. Schramm,David N. Schramm +6 more
TL;DR: In this paper, it was pointed out that neutron-star collisions should synthesize neutron-rich heavy elements, thought to be formed by rapid neutron capture (the r-process), and these collisions should produce neutrino bursts and resultant bursts of gamma rays; the latter should comprise a subclass of observable gamma-ray bursts.
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Gamma-ray bursters at cosmological distances
TL;DR: It has been shown that gamma-ray bursters are at cosmological distances, like quasars, with a redshift of about 1 or 2 as discussed by the authors, making them the brightest objects known in the universe.
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