The short-duration GRB 050724 host galaxy in the context of the long-duration GRB hosts

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dc.creatorGorosabel, J.
dc.creatorCastro-Tirado, A. J.
dc.creatorGuziy, S.
dc.creatorPostigo, A. de Ugarte
dc.creatorReverte, D.
dc.creatorAntonelli, A.
dc.creatorCovino, S.
dc.creatorMalesani, D.
dc.creatorMartín-Gordón, D.
dc.creatorMelandri, A.
dc.creatorJelínek, M.
dc.creatorBogdanov, O.
dc.creatorde la Rosa, N. Elias
dc.creatorCerón, J. M. Castro
dc.date2005-10-05
dc.date2006-01-13
dc.date.accessioned2026-07-07T07:34:25Z
dc.date.available2026-07-07T07:34:25Z
dc.descriptionWe report optical and near-infrared broad band observations of the short-duration GRB 050724 host galaxy, used to construct its spectral energy distribution (SED). Unlike the hosts of long-duration gamma-ray bursts (GRBs), which show younger stellar populations, the SED of the GRB 050724 host galaxy is optimally fitted with a synthetic elliptical galaxy template based on an evolved stellar population (age ~2.6 Gyr). The SED of the host is difficult to reproduce with non-evolving metallicity templates. In contrast, if the short GRB host galaxy metallicity enrichment is considered, the synthetic templates fit the observed SED satisfactorily. The internal host extinction is low (A_v \~< 0.4 mag) so it cannot explain the faintness of the afterglow. This short GRB host galaxy is more massive (~5x10^10 Mo) and luminous (~1.1 L*) than most of the long-duration GRB hosts. A statistical comparison based on the ages of short- and long-duration GRB host galaxies strongly suggests that short-duration GRB hosts contain, on average, older progenitors. These findings support a different origin for short- and long-duration GRBs.
dc.descriptionA&A in press
dc.identifierhttps://arxiv.org/abs/astro-ph/0510141
dc.identifierhttp://arxiv.org/abs/astro-ph/0510141
dc.identifierAstron.Astrophys. 450 (2006) 87-92
dc.identifierdoi:10.1051/0004-6361:20054373
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/119760
dc.subjectAstrophysics
dc.titleThe short-duration GRB 050724 host galaxy in the context of the long-duration GRB hosts
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