Research output: Contribution to journal › Conference article › peer-review
Optical polarisation variability of narrow line Seyfert 1 galaxies. / Angelakis, Emmanouil; Kiehlmann, S.; Myserlis, I.; Blinov, D.; Eggen, J.; Itoh, R.; Komossa, S.; Marchilli, N.; Zensus, J. A.
In: Proceedings of Science, Vol. 328, 01.01.2018.Research output: Contribution to journal › Conference article › peer-review
}
TY - JOUR
T1 - Optical polarisation variability of narrow line Seyfert 1 galaxies
AU - Angelakis, Emmanouil
AU - Kiehlmann, S.
AU - Myserlis, I.
AU - Blinov, D.
AU - Eggen, J.
AU - Itoh, R.
AU - Komossa, S.
AU - Marchilli, N.
AU - Zensus, J. A.
PY - 2018/1/1
Y1 - 2018/1/1
N2 - We have monitored the R-band optical linear polarisation of ten jetted NLSy1 galaxies with the aim to quantify their variability and search for candidate long rotation of the polarisation plane. In all cases for which adequate datasets are available we observe significant variability of both the polarisation fraction and angle. In the best-sampled cases we identify candidate long rotations of the polarisation plane. We present an approach that assesses the probability that the observed phenomenology is the result of pure noise. We conclude that although this possibility cannot be excluded it is much more likely that the EVPA undergoes an intrinsic evolution. We compute the most probable parameters of the intrinsic event which forecasts events consistent with the observations. In one case we find that the EVPA shows a preferred direction which, however, does not imply any dominance of a toroidal or poloidal component of the magnetic field at those scales.
AB - We have monitored the R-band optical linear polarisation of ten jetted NLSy1 galaxies with the aim to quantify their variability and search for candidate long rotation of the polarisation plane. In all cases for which adequate datasets are available we observe significant variability of both the polarisation fraction and angle. In the best-sampled cases we identify candidate long rotations of the polarisation plane. We present an approach that assesses the probability that the observed phenomenology is the result of pure noise. We conclude that although this possibility cannot be excluded it is much more likely that the EVPA undergoes an intrinsic evolution. We compute the most probable parameters of the intrinsic event which forecasts events consistent with the observations. In one case we find that the EVPA shows a preferred direction which, however, does not imply any dominance of a toroidal or poloidal component of the magnetic field at those scales.
UR - http://www.scopus.com/inward/record.url?scp=85073739318&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:85073739318
VL - 328
JO - Proceedings of Science
JF - Proceedings of Science
SN - 1824-8039
T2 - 2018 Revisiting Narrow-Line Seyfert 1 Galaxies and their Place in the Universe, NLS1 2018
Y2 - 9 April 2018 through 13 April 2018
ER -
ID: 49092717