A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Optical circular polarization of blazar S4 0954+65 during high linear polarized states
Tekijät: Liodakis I., Shablovinskaya E., Blinov D., Savchenko S. S., Malygin E., Kotov S., Kiehlmann S., Readhead A. C. S., Potter S. B., Rieger F. M., Grishina T. S., Hagen-Thorn V. A., Kopatskaya E. N., Larionova E. G., Morozova D. A., Troitskiy I. S., Troitskaya Y. V., Vasilyev A. A., Zhovtan A. V., Borman G. A.
Kustantaja: EDP Sciences
Julkaisuvuosi: 2023
Lehti: Astronomy and Astrophysics
Tietokannassa oleva lehden nimi: \aap
Artikkelin numero: L11
Vuosikerta: 680
eISSN: 1432-0746
DOI: https://doi.org/10.1051/0004-6361/202348214
Julkaisun avoimuus kirjaamishetkellä: Avoimesti saatavilla
Julkaisukanavan avoimuus : Kokonaan avoin julkaisukanava
Verkko-osoite: https://www.aanda.org/articles/aa/abs/2023/12/aa48214-23/aa48214-23.html
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/380655861
Preprintin osoite: https://arxiv.org/abs/2311.03450
Rinnakkaistallenteen lisenssi: CC BY
Rinnakkaistallennetun julkaisun versio: Kustantajan versio
Optical circular polarization observations can directly test the particle composition in black hole jets. We report the first observations of the BL Lac-type object S4 0954+65 in high linear polarized states. While no circular polarization was detected, we were able to place upper limits of < 0.5% at 99.7% confidence. Using a simple model and our novel optical circular polarization observations, we can constrain the allowed parameter space for the magnetic field strength and composition of the emitting particles. Our results favor models that require magnetic field strengths of only a few Gauss and models in which the jet composition is dominated by electron-positron pairs. We discuss our findings in the context of typical magnetic field strength requirements for blazar emission models.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
