A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Testing particle acceleration in blazar jets with continuous high-cadence optical polarization observations
Tekijät: Liodakis, Ioannis; Kiehlmann, Sebastian; Marscher, Alan P.; Zhang, Haocheng; Blinov, Dmitry; Jorstad, Svetlana G.; Agudo, Iván; Benítez, Erika; Berdyugin, Andrei; Bonnoli, Giacomo; Casadio, Carolina; Chen, Chien-Ting; Chen, Wen-Ping; Ehlert, Steven R.; Escudero, Juan; Grishina, Tatiana S.; Hiriart, David; Hsu, Angela; Imazawa, Ryo; Jermak, Helen E.; Jose, Jincen; Kaaret, Philip; Kopatskaya, Evgenia N.; Lalchand, Bhavana; Larionova, Elena G.; Lindfors, Elina; López, José M.; McCall, Callum; Morozova, Daria A.; Palaiologou, Efthymios; Pandey, Shivangi; Poutanen, Juri; Rakshit, Suvendu; Reig, Pablo; Sasada, Mahito; Savchenko, Sergey S.; Shablovinskaya, Elena; Sharma, Neha; Shrestha, Manisha; Steele, Iain A.; Troitskiy, Ivan S.; Troitskaya, Yulia V.; Uemura, Makoto; Vasilyev, Andrey A.; Weaver, Zachary; Wiersema, Klaas; Weisskopf, Martin C.
Kustantaja: EDP Sciences
Julkaisuvuosi: 2024
Journal: Astronomy and Astrophysics
Tietokannassa oleva lehden nimi: Astronomy & Astrophysics
Vuosikerta: 689
Aloitussivu: A200
ISSN: 0004-6361
eISSN: 1432-0746
DOI: https://doi.org/10.1051/0004-6361/202451037
Verkko-osoite: http://dx.doi.org/10.1051/0004-6361/202451037
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/458211332
Variability can be the pathway to understanding the physical processes in astrophysical jets. However, the high-cadence observations required to test particle acceleration models are still missing. Here we report on the first attempt to produce continuous, > 24 hour polarization light curves of blazars using telescopes distributed across the globe, following the rotation of the Earth, to avoid the rising Sun. Our campaign involved 16 telescopes in Asia, Europe, and North America. We observed BL Lacertae and CGRaBS J0211+1051 for a combined 685 telescope hours. We find large variations in the polarization degree and angle for both sources on sub-hour timescales as well as a ∼180° rotation of the polarization angle in CGRaBS J0211+1051 in less than two days. We compared our high-cadence observations to particle-in-cell magnetic reconnection and turbulent plasma simulations. We find that although the state-of-the-art simulation frameworks can produce a large fraction of the polarization properties, they do not account for the entirety of the observed polarization behavior in blazar jets.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
