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19 April 2024 |
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Spectral Energy Distributions of Type 1 AGN in XMM-COSMOS Survey II - Shape Evolution | | Heng Hao
; Martin Elvis
; Francesca Civano
; Gianni Zamorani
; Luis C. Ho
; Andrea Comastri
; Angela Bongiorno
; Andrea Merloni
; Marcella Brusa
; Jonathan R. Trump
; Mara Salvato
; Chris D. Impey
; Anton M. Koekemoer
; Giorgio Lanzuisi
; Annalisa Celotti
; Knud Jahnke
; Cristian Vignali
; John D. Silverman
; C. Megan Urry
; Kevin Schawinski
; Peter Capak
; | | Date: |
10 Oct 2012 | | Abstract: | The near-infrared to optical-ultraviolet (0.1 -- 10 $mu m$) spectral energy
distribution (SED) shapes of 407 X-ray-selected radio-quiet type 1 AGN in the
wide-field "Cosmic Evolution Survey" (COSMOS) have been studied for signs of
evolution. For a sub-sample of 200 radio-quiet quasars with black hole mass
estimation and host galaxy correction, we study the mean SEDs as a function of
a broad range of redshift, bolometric luminosity, black hole mass and Eddington
ratio, and compare them with the Elvis et al. (1994, E94) type 1 AGN mean SED.
The mean SEDs in each bin are very similar to each other, showing no evidence
of dependence on any of the analyzed parameters. We also checked the SED
dispersion as a function of these four parameters, and found no significant
dependance. The dispersion of the XMM-COSMOS SEDs is generally larger than E94
SED dispersion in the ultraviolet, which might be largely due to the broader
"window function" for COSMOS quasars, and the X-ray based selection technique. | | Source: | arXiv, 1210.3033 | | Services: | Forum | Review | PDF | Favorites | |
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