Dependence between some spectral and physical characteristics of quasars

2014/11/09 by O. Torbaniuk, Torbaniuk, O., G. Ivashchenko +1
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Astrophysics of Galaxies (astro-ph.GA) #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #astro-ph.CO #astro-ph.GA

paper · pdf · doi:10.48550/arxiv.1411.2179

6 pages, 13 figures, 2 tables, submitted to Proceedings of the "Week of Doctoral Students", Prague 3-5 June, 2014

arxiv created 2014/11/09 · openalex publication_date 2014/11/09 · arxiv updated 2014/11/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Using 192 composite spectra stacked from subsamples of individual SDSS DR7 quasar spectra binned in spectral index, α_λ, and logarithm of monochromatic luminosity at 1450 Å, logl₁₄₅₀, we found that there is a dependence of the emission line equivalent width (EW) on spectral index (correlation or anti-correlation) for some lines, mostly for those lines for which the Baldwin effect is detected. We also show that there is no dependence between the virial mass of the central supermassive black hole of a quasar and its spectral index α_λ.

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