Optical EVPA rotations in blazars

Kiehlmann, S.; Blinov, D.; Pearson, T. J.; Liodakis, I.

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Optical EVPA rotations in blazars

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Title:	Optical EVPA rotations in blazars
Author(s):	Kiehlmann, S. ; Blinov, D. ; Pearson, T. J. ; Liodakis, I.
Date:	2017-12
Language:	en
Pages:	16 3589-3604
Department:	Metsähovi Radio Observatory St. Petersburg State University California Institute of Technology Stanford University Department of Radio Science and Engineering
Series:	Monthly Notices of the Royal Astronomical Society, Volume 472, issue 3
ISSN:	0035-8711 1365-2966
DOI-number:	10.1093/mnras/stx2167
Keywords:	polarization, galaxies: active, galaxies: jets, galaxies: nuclei, COMPACT RADIO-SOURCES, GAMMA-RAY-LOUD, POLARIZATION-PLANE, INNER JET, REGIONS, SWINGS, OJ-287, ANGLE
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Citation: Kiehlmann , S , Blinov , D , Pearson , T J & Liodakis , I 2017 , ' Optical EVPA rotations in blazars : testing a stochastic variability model with RoboPol data ' , Monthly Notices of the Royal Astronomical Society , vol. 472 , no. 3 , pp. 3589-3604 . https://doi.org/10.1093/mnras/stx2167
Abstract: We identify rotations of the polarization angle in a sample of blazars observed for three seasons with the RoboPol instrument. A simplistic stochastic variability model is tested against this sample of rotation events. The model is capable of producing samples of rotations with parameters similar to the observed ones, but fails to reproduce the polarization fraction at the same time. Even though we can neither accept nor conclusively reject the model, we point out various aspects of the observations that are fully consistent with a random walk process.

Permanent link to this item: http://urn.fi/URN:NBN:fi:aalto-202103222531 Email this Export to RefWorks QR Code Print BibTex Tweet