Optical Microvariability in Quasars: Spectral Variability

Details Optical Microvariability in Quasars: Spectral Variability Optical Microvariability in Quasars: Spectral Variability

2010-04-07

arxiv.org/abs/1004.1199v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Accepted for publication in the Astrophysical Journal

Scientific paper

We present a method that we developed to discern where the optical microvariability (OM) in quasars originates: in the accretion disk (related to thermal processes) or in the jet (related to non-thermal processes). Analyzing nearly simultaneous observations in three different optical bands of continuum emission, we are able to determine the origin of several isolated OM events. In particular, our method indicates that from nine events reported by Ramirez et al. (2009), three of them are consistent with a thermal origin, three to non-thermal, and three cannot be discerned. The implications for the emission models of OM are briefly discussed.

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