Quasi-Periodicities at Year Time Scales in Blazars

Abstract

We examine the 2008-2016 gamma-ray and optical light curves of a number of bright Fermi blazars. In a fraction of them, the periodograms show possible evidence of quasi-periodicities related in the two bands. This coincidence strengthens their physical meaning. Comparing with results from the periodicity search of quasars, the presence of quasi-periodicities in blazars suggests that the basic condition for its observability is related to the relativistic jet in the observer direction, but the overall picture remains uncertain.

4 pages, 3 figures, in press, New Frontiers in Black Hole Astrophysics. Proceedings IAU Symposium No 324, 2017. Andreja Gomboc and Carole Mundell, eds

References in corpus (2)

• A Population of Short-Period Variable Quasars from PTF as Supermassive Black Hole Binary Candidates
• A comparative study of four significance measures for periodicity detection in astronomical surveys

Cited by in corpus (1)

• Looking at Blazar Light Curve Periodicities with Gaussian Processes