6533b820fe1ef96bd12791a1

RESEARCH PRODUCT

Different progenitors of short hard gamma-ray bursts

G. CusumanoN. LyonsEleonora TrojaEleonora TrojaEleonora TrojaP. T. O'brienAndrew J. King

subject

PhysicsAstrophysics::High Energy Astrophysical PhenomenaAstrophysics (astro-ph)Low offsetFOS: Physical sciencesBinary numberAstronomy and AstrophysicsAstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsGalaxyAfterglowSpace and Planetary ScienceLow densityGamma-ray burstAstrophysics::Galaxy Astrophysics

description

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.

yearjournalcountryeditionlanguage
2007-11-19
10.1111/j.1745-3933.2007.00421.xhttp://arxiv.org/abs/0711.3034