Abstract
Abstract Evidence for the presence of quasi-periodic oscillations (QPOs) in the optical polarization of the blazar PKS 2155–304, during a period of enhanced gamma-ray brightness, is presented. The periodogram of the polarized flux revealed the existence of a prominent peak at T ∼ 13 min, detected at >99.7 per cent significance, and T ∼ 30 min, which was nominally significant at >99 per cent. This is the first evidence of QPOs in the polarization of an active galactic nucleus, potentially opening up a new avenue of studying this phenomenon.
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Schedule a callMore From: Monthly Notices of the Royal Astronomical Society: Letters
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