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The Alpha Centauri binary system

  • Porto de Mello G
  • Lyra W
  • Keller G
Astronomy & Astrophysics (2008) 488(2) 653-666
DOI: 10.1051/0004-6361:200810031
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Abstract

We investigate the metallicity of the broad line region (BLR) of a sample of 30 quasars in the redshift range 4 6 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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Porto de Mello, G. F., Lyra, W., & Keller, G. R. (2008). The Alpha Centauri binary system. Astronomy & Astrophysics, 488(2), 653–666. https://doi.org/10.1051/0004-6361:200810031

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