Type 1 AGN SEDs in COSMOS

Mathematics – Logic

Scientific paper

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Agn Evolution

Scientific paper

A detailed study of the evolution of the Spectral Energy Distribution (SED) shapes near 1μ m of 324 Type 1 AGNs in the wide-field ``Cosmological Evolution Survey'' (COSMOS) as a function of luminosity, redshift and Eddington ratio is presented. We study the mean SEDs in redshift bins and bolometric luminosity bins and compare them with Elvis et al. 1994 Type 1 AGN mean SED (E94). We also study the position of our sources in the slope plot relative to the quasar-host galaxy mixing curve and dust reddening curve. We found that E94 is remarkably good in describing the SED shape near 1μ m even for high luminosity, redshift and Eddington ratio Type 1 AGNs. We also show examples of some outliers which might be AGNs in different evolution stages compared to normal AGNs.

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