A study of compact object mergers as short gamma-ray burst progenitors

被引:258
作者
Belczynski, Krzysztof
Perna, Rosalba
Bulik, Tomasz
Kalogera, Vassiliki
Ivanova, Natalia
Lamb, Donald Q.
机构
[1] New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA
[2] Univ Colorado, JILA, Boulder, CO 80309 USA
[3] Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA
[4] Warsaw Univ, Astron Observ, PL-00478 Warsaw, Poland
[5] Nicolaus Copernicus Astron Ctr, PL-00716 Warsaw, Poland
[6] Northwestern Univ, Dept Phys, Evanston, IL 60208 USA
[7] Univ Toronto, CITA, Toronto, ON M5S 3H8, Canada
[8] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA
关键词
binaries : close; black hole physics; gamma rays : bursts; stars : evolution; stars : formation; stars : neutron;
D O I
10.1086/505169
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
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).
引用
收藏
页码:1110 / 1116
页数:7
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