The metallicity of the most distant quasars

Details The metallicity of the most distant quasars The metallicity of the most distant quasars

2009-01-08

arxiv.org/abs/0901.0974v2

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Accepted for publication in A&A Letters, replaced with published version, typos corrected

Scientific paper

10.1051/0004-6361:200811415

We investigate the metallicity of the broad line region (BLR) of a sample of 30 quasars in the redshift range 46 quasars. The latter result is puzzling, since the minimum enrichment timescale of carbon is about 1 Gyr, i.e. longer than the age of the universe at z~6.

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