Quasar Properties from the Sloan Digital Sky Survey. III. The Quasars Obtained by the SDSS-IV
| Autor: | Wei-Rong Huang, Zhe-Geng Chen, Zhi-Fu Chen, Xiao-Feng Li |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | The Astrophysical Journal Supplement Series, Vol 264, Iss 2, p 52 (2023) |
| Druh dokumentu: | article |
| ISSN: | 1538-4365 0067-0049 |
| DOI: | 10.3847/1538-4365/aca6e2 |
| Popis: | This paper provides the compilations of properties of the quasars newly obtained by the Sloan Digital Sky Survey (SDSS) during the fourth stage (SDSS-IV). The catalog is available on the journal's website. We have measured the main properties of emission lines around C iv , Mg ii , H β , and H α spectral regions. We estimate the quasar redshifts from our fits of narrow [O iii ], broad Mg ii , and broad C iv emission lines and find that the best redshifts included in DR16Q are robust with respect to our measurements. Based on the broad C iv , Mg ii , H β , and/or H α emission lines, we calculate the virial black hole mass with empirical relationships provided by previous works. Systematic biases are found among the different line-based mass estimators. |
| Databáze: | Directory of Open Access Journals |
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