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Metallicities of high redshift GRB hosts: The case of GRB 100219A

By C.C. Thöne, J. Fynbo, P. Goldoni, A. De Ugarte Postigo, S. Covino and S. Campana

Abstract

International audienceGRB 100219A at z=4.667 has been the highest redshift gamma-ray burst observed with the X-shooter spectrograph up to now. The spectrum covering the range from 5000 to 24 000 Åand a large number of absorption lines allows to make a detailed study of the interstellar medium in a high redshift galaxy. The ISM in the low ionisation state and the kinematics of the absorption line components reveal a complex velocity field. The metallicity measured from different absorption lines is around 0.1 solar. Other GRB hosts at redshift beyond ˜3 have similar metallicities albeit with a large scatter in the metallicity distribution. X-shooter will allow us to determine metallicities of a larger number of GRB hosts beyond redshift 5, to probe the early chemical enrichment of the Universe and to study its evolution from redshift 2 to beyond 10

Topics: gamma rays, bursts, galaxies, ISM, abundances, [ PHYS.ASTR.HE ] Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], [ SDU.ASTR.HE ] Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], [ PHYS.ASTR.CO ] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], [ SDU.ASTR.CO ] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]
Publisher: Wiley-VCH Verlag
Year: 2011
DOI identifier: 10.1002/asna.201111535
OAI identifier: oai:HAL:hal-00708877v1
Provided by: Hal-Diderot
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