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- W2017372912 abstract "We investigate the luminosity and color evolutions of a sample of ∼550 quasars with redshifts 0.4<z<2.2. The flux and color distributions are compared with those expected for thin accretion disk spectra, and it is found that fost sources are adequately described as thin disks. A significant number of sources, however, have colors too blue to be standard thin disks, and we postulate that these blue spectra represent young, super-Eddington sources with modified accretion structures such as radiation tori, filaments, or clouds. Using the thin disk model, we map the observed flux-color distribution onto the mass-accretion rate parameter space" @default.
- W2017372912 created "2016-06-24" @default.
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- W2017372912 date "1993-02-01" @default.
- W2017372912 modified "2023-09-27" @default.
- W2017372912 title "Evolution of the luminosity-color distribution of quasar accretion disks" @default.
- W2017372912 doi "https://doi.org/10.1086/172306" @default.
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