A Study of Compact Object Mergers as Short Gamma‐Ray Burst Progenitors | Zendy

Krzysztof Belczyński | Zendy; Rosalba Perna | Zendy; T. Bulik | Zendy; V. Kalogera | Zendy; Natalia Ivanova | Zendy; Donald Q. Lamb | Zendy

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A Study of Compact Object Mergers as Short Gamma‐Ray Burst Progenitors

Author(s) -

Krzysztof Belczyński,

Rosalba Perna,

T. Bulik,

V. Kalogera,

Natalia Ivanova,

Donald Q. Lamb

Publication year - 2006

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/505169

Subject(s) - gamma ray burst , physics , astrophysics , neutron star , compact star , afterglow , galaxy , gamma ray burst progenitors , population , astronomy , stellar black hole , intermediate mass black hole , demography , sociology

We present a theoretical study of double compact objects as potentialshort/hard gamma-ray burst (GRB) progenitors. An updated population synthesiscode StarTrack is used to calculate properties of double neutron stars andblack-hole neutron star binaries. We obtain their formation rates, estimatemerger times and finally predict their most likely merger locations andafterglow properties for different types of host galaxies. Our results servefor a direct comparison with the recent HETE-II and SWIFT observations ofseveral short bursts, for which afterglows and host galaxies were detected. Wealso discuss the possible constraints these observations put on theevolutionary models of double compact object formation. We emphasize that ourdouble compact object models can successfully reproduce at the same time shortGRBs within both young, star-forming galaxies (e.g., GRB 050709 and GRB051221A), as well as within old, elliptical hosts (e.g., GRB 050724 andprobably GRB 050509B)Comment: ApJ, in pres

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