Quasi-Periodic Oscillations in the X-ray Light Curves of Blazars

Details Quasi-Periodic Oscillations in the X-ray Light Curves of Blazars Quasi-Periodic Oscillations in the X-ray Light Curves of Blazars

Jun 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011japa...32..147w&link_type=abstract

Journal of Astrophysics and Astronomy, Volume 32, Issue 1-2, pp. 147-154

Astronomy and Astrophysics

Astrophysics

Galaxies: Active, Bl Lacertae Objects: General, Galaxies: Jets, Quasars: General, Galaxies, Active—Bl Lacertae Objects, General—Galaxies, Jets—Quasars, General

Scientific paper

Any quasi-periodic variations discovered in blazar light curves would contain important information on the location and nature of the processes within the emission regions. In non-blazar active galactic nuclei, particularly Seyfert galaxies, any such fluctuations are very likely to be associated with the accretion disks, but in blazars they would almost certainly have to emanate from jets. This brief review summarizes recent claims for the presence of quasi-periodic variability in the X-ray emission of several AGN, focusing on blazars. Although no individual claim of the presence of a QPO in AGN X-ray light curves is absolutely convincing, there are some good cases for the presence of QPOs, including the Narrow Line Seyfert 1 galaxy, RE J1034+396, the quasar, 3C 273 and the BL Lac, PKS 2155-304.

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