High-Redshift Quasars as Early Star Formation Probes
For a sample of 20 quasars (3 ≤ = ≤ 5) we used emission-line ratios to estimate nuclear gas metallicities and the Fe IIUV/MgII line ratio was employed to probe for effects of differential metal enrichment timescales between iron and α-elements. The quasars show enhanced solar metall...
Guardado en:
| Publicado en: | Revista Mexicana de Astronomía y Astrofísica |
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| Autores principales: | , |
| Formato: | Artigo |
| Lenguaje: | Inglês |
| Publicado: |
Universidad Nacional Autónoma de México
2008
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| Materias: | |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=57103224 |
| Etiquetas: |
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