Artículo
GRB 050223: a dark GRB in a dusty starburst galaxy
Pellizza González, Leonardo Javier
; Duc, P. A.; Le Floc'h, E.; Mirabel Miquele, Igor Felix
; Antonelli, L. A.; Campana, S.; Chincarini, G.; Cimatti, A.; Covino, S.; Della Valle, M.; Fiore, F.; Fugazza, D.; Giommi, P.; Goldoni, P.; Israel, G. L.; Molinari, E.; Moretti, A.; Piro, L.; Saracco, P.; Stella, L.; Tagliaferri, G.; Vietri, M.
; Duc, P. A.; Le Floc'h, E.; Mirabel Miquele, Igor Felix
; Antonelli, L. A.; Campana, S.; Chincarini, G.; Cimatti, A.; Covino, S.; Della Valle, M.; Fiore, F.; Fugazza, D.; Giommi, P.; Goldoni, P.; Israel, G. L.; Molinari, E.; Moretti, A.; Piro, L.; Saracco, P.; Stella, L.; Tagliaferri, G.; Vietri, M.
Fecha de publicación:
11/2006
Editorial:
Edp Sciences
Revista:
Astronomy And Astrophysics
ISSN:
0004-6361
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Aims.We aim at detecting and determining the properties of the host galaxy of the dark GRB 050223.
Methods.We use VLT optical/NIR images coupled to Swift X-ray positioning, and optical spectra of the host galaxy to measure its properties.
Results.We find a single galaxy within the Swift error box of GRB 050223. It is located at and its luminosity is L*. Emission lines in the galaxy spectrum imply an intrinsic yr-1, and a large extinction mag within it. We also detect absorption lines, which reveal an underlying stellar population with an age between 40 Myr and 1.5 Gyr.
Conclusions.The identification of a host galaxy with atypical properties using only the X-ray transient suggests that a bias may be present in the former sample of host galaxies. Dust obscuration together with intrinsic faintness are the most probable causes for the darkness of this burst.
Palabras clave:
Gamma Rays: Bursts
,
Galaxies: Starbursts
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328.0Kb
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Licencia
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)
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Colecciones
Articulos(IAFE)
Articulos de INST.DE ASTRONOMIA Y FISICA DEL ESPACIO(I)
Articulos de INST.DE ASTRONOMIA Y FISICA DEL ESPACIO(I)
Citación
Pellizza González, Leonardo Javier; Duc, P. A.; Le Floc'h, E.; Mirabel Miquele, Igor Felix; Antonelli, L. A.; et al.; GRB 050223: a dark GRB in a dusty starburst galaxy; Edp Sciences; Astronomy And Astrophysics; 459; 1; 11-2006; 5-8
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