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arXiv · 0711.3034

Different progenitors of short hard gamma-ray bursts

Eleonora Troja·Andrew R. King·Paul T. O'Brien·Nicola Lyons·Giancarlo Cusumano
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Abstract

We consider the spatial offsets of short hard gamma-ray bursts (SHBs) from their host galaxies. We show that all SHBs with extended duration soft emission components lie very close to their hosts. We suggest that NS-BH binary mergers offer a natural explanation for the properties of this extended duration/low offset group. SHBs with large offsets have no observed extended emission components and are less likely to have an optically detected afterglow, properties consistent with NS-NS binary mergers occurring in low density environments.

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Eleonora Troja, Andrew R. King, Paul T. O'Brien, Nicola Lyons, Giancarlo Cusumano. 2007-11-19. Different progenitors of short hard gamma-ray bursts. https://doi.org/10.1111/j.1745-3933.2007.00421.x

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