Show simple item record Le Floch, E. Duc, P. Mirabel Miquele, Igor Felix Sanders, D. Bosch, Guillermo Luis Diaz, Ruben Joaquin Donzelli, Carlos Jose Rodrigues, I. Courvoisier, T. Greiner, J. Mereghetti, S. Melnick, J. Maza, J. Minitti, D. 2018-03-21T21:54:32Z 2003-03
dc.identifier.citation Le Floch, E.; Duc, P.; Mirabel Miquele, Igor Felix; Sanders, D.; Bosch, Guillermo Luis; et al.; Are the hosts of gamma-ray bursts sub-luminous and blue galaxies?; EDP Sciences; Astronomy and Astrophysics; 400; 2; 3-2003; 499-510
dc.identifier.issn 0004-6361
dc.description.abstract We present K-band imaging observations of ten gamma-ray burst (GRB) host galaxies for which an optical and/or radio afterglow associated with the GRB event was clearly identified. Data were obtained with the Very Large Telescope and New Technology Telescope at ESO (Chile), and with the Gemini-North telescope at Mauna Kea (Hawaii). Adding to our sample nine other GRB hosts with K-band photometry and determined redshifts published in the literature, we compare their observed and absolute K magnitudes as well as their R − K colours with those of other distant sources detected in various optical, nearinfrared, mid-infrared and submillimeter deep surveys. We find that the GRB host galaxies, most of them lying at 0.5 <∼ z <∼ 1.5, exhibit very blue colours, comparable to those of the faint blue star-forming sources at high redshift. They are sub-luminous in the K-band, suggesting a low stellar mass content. We do not find any GRB hosts harbouring R- and K-band properties similar to those characterizing the luminous infrared/submillimeter sources and the extremely red starbursts. Should GRBs be regarded as an unbiased probe of star-forming activity, this lack of luminous and/or reddened objects among the GRB host sample might reveal that the detection of GRB optical afterglows is likely biased toward unobscured galaxies. It would moreover support the idea that a large fraction of the optically-dark GRBs occur within dust-enshrouded regions of star formation. On the other hand, our result might also simply reflect intrinsic properties of GRB host galaxies experiencing a first episode of very massive star formation and characterized by a rather weak underlying stellar population. Finally, we compute the absolute B magnitudes for the whole sample of GRB host galaxies with known redshifts and detected at optical wavelengths. We find that the latter appear statistically even less luminous than the faint blue sources which mostly contributed to the B-band light emitted at high redshift. This indicates that the formation of GRBs could be favoured in particular systems with very low luminosities and, therefore, low metallicities. Such an intrinsic bias toward metal-poor environments would be actually consistent with what can be expected from the currently-favoured scenario of the “collapsar”. The forthcoming launch of the SWIFT mission at the end of 2003 will provide a dramatic increase of the number of GRB-selected sources. A detailed study of the chemical composition of the gas within this sample of galaxies will thus allow us to further analyse the potential effect of metallicity in the formation of GRB events.
dc.format application/pdf
dc.language.iso eng
dc.publisher EDP Sciences
dc.rights info:eu-repo/semantics/openAccess
dc.subject Galaxies
dc.subject Starbursts
dc.subject Evolution of galaxies
dc.subject Cosmology
dc.subject Gamma ray bursts
dc.subject.classification Astronomía
dc.subject.classification Ciencias Físicas
dc.subject.classification CIENCIAS NATURALES Y EXACTAS
dc.title Are the hosts of gamma-ray bursts sub-luminous and blue galaxies?
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion 2018-02-19T16:56:36Z
dc.journal.volume 400
dc.journal.number 2
dc.journal.pagination 499-510
dc.journal.pais Francia
dc.journal.ciudad Paris, France
dc.description.fil Fil: Le Floch, E.. CEA/DSM/DAPNIA Service d’Astrophysique; Francia
dc.description.fil Fil: Duc, P.. CEA/DSM/DAPNIA Service d’Astrophysique; Francia. Centre National de la Recherche Scientifique; Francia
dc.description.fil Fil: Mirabel Miquele, Igor Felix. CEA/DSM/DAPNIA Service d’Astrophysique; Francia. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
dc.description.fil Fil: Sanders, D.. Max Planck Institut für Extraterrestrische Physik; Alemania
dc.description.fil Fil: Bosch, Guillermo Luis. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
dc.description.fil Fil: Diaz, Ruben Joaquin. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina
dc.description.fil Fil: Donzelli, Carlos Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
dc.description.fil Fil: Rodrigues, I.. CEA/DSM/DAPNIA Service d’Astrophysique; Francia
dc.description.fil Fil: Courvoisier, T.. INTEGRAL Science Data Center; Suiza
dc.description.fil Fil: Greiner, J.. Max Planck Institut für Extraterrestrische Physik; Alemania
dc.description.fil Fil: Mereghetti, S.. Istituto di Astrofisica Spaziale e Fisica Cosmica; Italia
dc.description.fil Fil: Melnick, J.. European Southern Observatory; Chile
dc.description.fil Fil: Maza, J.. Universidad de Chile; Chile
dc.description.fil Fil: Minitti, D.. Pontificia Universidad Católica de Chile; Chile
dc.journal.title Astronomy and Astrophysics
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)