The GRB 030329 host: a blue low metallicity subluminous galaxy with intense star formation

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dc.creatorGorosabel, J.
dc.creatorPérez-Ramírez, D.
dc.creatorSollerman, J.
dc.creatorPostigo, A. de Ugarte
dc.creatorFynbo, J. P. U.
dc.creatorCastro-Tirado, A. J.
dc.creatorJakobsson, P.
dc.creatorChristensen, L.
dc.creatorHjorth, J.
dc.creatorJóhannesson, G.
dc.creatorGuziy, S.
dc.creatorCerón, J. M. Castro
dc.creatorBjornsson, G.
dc.creatorSokolov, V. V.
dc.creatorFatkhullin, T. A.
dc.creatorNilsson, K.
dc.date2005-07-20
dc.date.accessioned2026-07-07T06:26:10Z
dc.date.available2026-07-07T06:26:10Z
dc.descriptionWe present broad band photometry and spectroscopic observations of the host galaxy of GRB 030329. Analysis of the spectral emission lines shows that the host is likely a low metallicity galaxy (Z~0.004). The spectral energy distribution (SED) constructed with the photometric points has been fitted using synthetic and observational templates. The best SED fit is obtained with a starburst template with an age of ~150 Myr and an extinction Av~0.6. We find that the GRB 030329 host galaxy is a subluminous galaxy (L~0.016 L*) with a stellar mass of >~10^8 Mo. Three independent diagnostics, based on the restframe UV continuum, the [OII], and the Balmer emission lines, provide a consistent unextincted star formation rate of ~0.6 Mo yr^-1, implying a high unextincted specific star formation rate (~34 Mo yr^-1 (L/L*)^-1). We estimate that the unextincted specific star formation rate of the GRB 030329 host is higher than ~93.5% of the galaxies at a similar redshift.
dc.description11 pages, 4 figures. Accepted for publication in A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/0507488
dc.identifierhttp://arxiv.org/abs/astro-ph/0507488
dc.identifierAstron.Astrophys. 444 (2005) 711-721
dc.identifierdoi:10.1051/0004-6361:20052768
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/97032
dc.subjectAstrophysics
dc.titleThe GRB 030329 host: a blue low metallicity subluminous galaxy with intense star formation
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