Abstract.
Here we report our recent discoveries of Quasi-Periodic Oscillations (QPOs) in blazars time series data in X-ray and optical electromagnetic bands. Any such detection can give important clue of the location and nature of the processes of emission mechanism. In the case of radio-quiet AGN, the detected QPOs are very likely to be associated with the accretion disk. But in the case of blazars, it may be associated with jets in the high and outburst states, and in the low-state, it is probably associated with the accretion disk. In this brief review, I summarize the recent QPOs detections in blazars. There is one strong evidence of QPO detection in XMM–Newton time series data of narrow line Seyfert 1 galaxy RE J1034 +396 about which we will also discuss briefly.
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Gupta, A.C. Quasi Periodic Oscillations in Blazars. J Astrophys Astron 35, 307–314 (2014). https://doi.org/10.1007/s12036-014-9219-7
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DOI: https://doi.org/10.1007/s12036-014-9219-7