Optical EVPA rotations in blazars: testing a stochastic variability model with RoboPol data

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

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

18 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)3589-3604
Number of pages16
JournalMonthly Notices of the Royal Astronomical Society
Volume472
Issue number3
DOIs
Publication statusPublished - Dec 2017
MoE publication typeA1 Journal article-refereed

Keywords

  • polarization
  • galaxies: active
  • galaxies: jets
  • galaxies: nuclei
  • COMPACT RADIO-SOURCES
  • GAMMA-RAY-LOUD
  • POLARIZATION-PLANE
  • INNER JET
  • REGIONS
  • SWINGS
  • OJ-287
  • ANGLE

Cite this