RoboPol: connection between optical polarization plane rotations and gamma-ray flares in blazars

I. Papamastorakis; A. Ramaprakash; P. Reig; D. Blinov; A. Kus; J. A. Zensus; I. Liodakis; E. Pazderski; N. Kylafis; T. Hovatta; E. Angelakis; I. Myserlis; T. J. Pearson; K. Tassis; S. Maharana; O. G. King; G. V. Panopoulou; S. Kiehlmann; E. Paleologou; I. Papadakis; A. Mahabal; M. Balokovi´c; A. C. S. Readhead; V. Pavlidou
RoboPol: connection between optical polarization plane rotations and gamma-ray flares in blazars

I. Papamastorakis
A. Ramaprakash
P. Reig
D. Blinov
A. Kus
J. A. Zensus
I. Liodakis
E. Pazderski
N. Kylafis
T. Hovatta
E. Angelakis
I. Myserlis
T. J. Pearson
K. Tassis
S. Maharana
O. G. King
G. V. Panopoulou
S. Kiehlmann
E. Paleologou
I. Papadakis
A. Mahabal
M. Balokovi´c
A. C. S. Readhead
V. Pavlidou
Katso/Avaa
Lataukset: 

OXFORD UNIV PRESS
doi:10.1093/mnras/stx2786
Näytä kaikki kuvailutiedot
Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2021042718865
Tiivistelmä
We use results of our 3 yr polarimetric monitoring programme to investigate the previously suggested connection between rotations of the polarization plane in the optical emission of blazars and their gamma-ray flares in the GeV band. The homogeneous set of 40 rotation events in 24 sources detected by RoboPol is analysed together with the gamma-ray data provided by Fermi-LAT. We confirm that polarization plane rotations are indeed related to the closest gamma-ray flares in blazars and the time lags between these events are consistent with zero. Amplitudes of the rotations are anticorrelated with amplitudes of the gamma-ray flares. This is presumably caused by higher relativistic boosting (higher Doppler factors) in blazars that exhibit smaller amplitude polarization plane rotations. Moreover, the time-scales of rotations and flares are marginally correlated.
Kokoelmat