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

Krzysztof Belczynski*, Rosalba Perna, Tomasz Bulik, Vassiliki Kalogera, Natalia Ivanova, Donald Q. Lamb

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

214 Scopus citations

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 051221 A), as well as within old, elliptical hosts (e.g., GRB 050724 and probably GRB 050509B).

Original languageEnglish (US)
Pages (from-to)1110-1116
Number of pages7
JournalAstrophysical Journal
Volume648
Issue number2 I
DOIs
StatePublished - Sep 10 2006

Keywords

  • Binaries: close
  • Black hole physics
  • Gamma rays: bursts
  • Stars: evolution
  • Stars: formation
  • Stars: neutron

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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