Constraining Models of Quasar Evolution Using SDSS (original) (raw)

Abstract

The unprecedented large number of quasar candidates included in the latest data release of SDSS (DR5) make it possible to constrain models for quasar evolution by mapping the quasars in a time-luminosity plane. Analyzing the features of the rise and fall of this map, as well as other spectroscopic information from SDSS like the mass obtained from reverberation methods, we can infer typical individual quasar trajectories starting with their formation, growth predominantly by baryonic accretion followed by the luminosity decay. The remarkable smoothness of the luminosity decay for the overall sample of quasars following a long period of our Universe's evolution suggests that there are more similarities than differences in the behavior of quasars at high red-shifts and low red-shifts.

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