The Metallicity of High-z GRBs: the Case of GRB 111008A
Abstract
With optical and near-infrared follow-up observations of gamma-ray bursts (GRBs) it is possible to study the chemical enrichment of galaxies at high redshift. Especially interesting are measurements of the metallicity of GRB host with z 4.7, since it has recently been shown that damped Lymann-α absorbers have a rapid decrease in metallicity at this redshift (Rafelski et al. 2013). In this paper measurements of the amount of metals and dust in the host galaxy of GRB 111008A at z=5.0 is presented, and it is discussed how observations of more high-z GRB host galaxies can give clues about dust formation mechanisms and the distribution of metals in the early Universe.
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