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| Paper: |
Quasar Intrinsic Absorption Lines: Probing High Redshift Galaxy Evolution |
| Volume: |
290, Active Galactic Nuclei: from Central Engine to Host Galaxy |
| Page: |
593 |
| Authors: |
Hamann, F.; Sabra, B.; Narayanan, D.; Barlow, T.; Chaffee, F.; Junkkarinen, V. |
| Abstract: |
The emission and absorption lines in quasar spectra provide measures of the gas-phase metal abundances at various locations in the host galaxies. The derived metallicities are typically near or several times above the solar value, indicating that quasars are preceded by, or coeval with, an episode of rapid and extensive star formation in the surrounding galactic (or proto-galactic) nuclei. These stars might be among the first to form in dense collapsed structures after the big bang. Chemical evolution models of these environments suggest that, to reach Z > Zo in well-mixed interstellar gas, the star formation must have begun > 0.1 Gyr before the observed quasar activity. |
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