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- W2043459207 abstract "We describe the results of a survey of the UV absorption properties of the Boroson & Green sample of active galactic nuclei (AGNs), which extends from the Seyfert (MV ≃ -21) to the luminous quasar (MV ≃ -27) level. The survey is based mostly on Hubble Space Telescope archival data available for ≳ of the 87 sample objects. Our main result is that soft X-ray-weak quasars (SXWQs; 10 AGNs with αox ≤ -2) show the strongest UV absorption at a given luminosity, and their maximum outflow velocity, vmax, is strongly correlated with MV (rS = -0.95). This suggests that vmax is largely set by the luminosity, as expected for radiation pressure-driven outflows. Luminous SXWQs have preferentially low [O III] luminosity, which suggests that they are physically distinct from unabsorbed AGNs, while non-SXWQs with UV absorption are consistent with being drawn from the unabsorbed AGN population. We also find an indication that vmax/vBLR increases with L/LEdd, as expected for radiation pressure-driven outflows. This relation and the vmax versus MV relation may indicate that the radiation-pressure force multiplier increases with luminosity and that the wind-launching radius in non-SXWQs is ~10 times larger than in SXWQs." @default.
- W2043459207 created "2016-06-24" @default.
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- W2043459207 date "2002-04-20" @default.
- W2043459207 modified "2023-10-11" @default.
- W2043459207 title "The Luminosity Dependence of Ultraviolet Absorption in Active Galactic Nuclei" @default.
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- W2043459207 doi "https://doi.org/10.1086/339476" @default.
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