No Redshift Evolution in the Fe ii/Mg ii Flux Ratios of Quasars across Cosmic Time
The Fe ii /Mg ii emission line flux ratio in quasar spectra serves as a proxy for the relative Fe to α -element abundances in the broad-line regions of quasars. Due to the expected different enrichment timescales of the two elements, they can be used as a cosmic clock in the early Universe. We prese...
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| Principais autores: | , , , , , , , , , , , , , , , |
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| Formato: | Artigo |
| Idioma: | Inglês |
| Publicado em: |
IOP Publishing
2024-01-01
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| coleção: | The Astrophysical Journal |
| Assuntos: | |
| Acesso em linha: | https://doi.org/10.3847/1538-4357/ad7d09 |
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