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Abstract: We investigate the metallicity of the broad line region BLR of a sample of30 quasars in the redshift range 46 quasars. The latter result is puzzling, since theminimum enrichment timescale of carbon is about 1 Gyr, i.e. longer than the ageof the universe at z~6.



Author: Y. Juarez, R. Maiolino, R. Mujica, M. Pedani, S. Marinoni, T. Nagao, A. Marconi, E. Oliva

Source: https://arxiv.org/







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