Binary star progenitors of long gamma-ray bursts

Details Binary star progenitors of long gamma-ray bursts Binary star progenitors of long gamma-ray bursts

2007-02-20

arxiv.org/abs/astro-ph/0702540v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in A&A Letters

Scientific paper

10.1051/0004-6361:20077115

We present a binary channel for the progenitors of long gamma-ray bursts. We test the idea of producing rapidly rotating Wolf-Rayet stars in massive close binaries through mass accretion and consecutive quasi-chemically homogeneous evolution. The binary channel presented here may provide a means for massive stars to obtain the required high rotation rates. Moreover, it suggests that a possibly large fraction of long gamma-ray bursts occurs in runaway stars. This can have important observational consequences for both the positions of GRBs, and their afterglow properties.

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