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Testing particle acceleration in blazar jets with continuous high-cadence optical polarization observations

Liodakis, I, Kiehlmann, S, Marscher, AP, Zhang, H, Blinov, D, Jorstad, SG, Agudo, I, Benítez, E, Berdyugin, A, Bonnoli, G, Casadio, C, Chen, C-T, Chen, W-P, Ehlert, SR, Escudero, J, Grishina, TS, Hiriart, D, Hsu, A, Imazawa, R, Jermak, HE , Jose, J, Kaaret, P, Kopatskaya, EN, Lalchand, B, Larionova, EG, Lindfors, E, López, JM, McCall, C, Morozova, DA, Palaiologou, E, Pandey, S, Poutanen, J, Rakshit, S, Reig, P, Sasada, M, Savchenko, SS, Shablovinskaya, E, Neha, S, Shrestha, M, Steele, IA, Troitskiy, IS, Troitskaya, YV, Uemura, M, Vasilyev, AA, Weaver, Z, Wiersema, K and Weisskopf, MC Testing particle acceleration in blazar jets with continuous high-cadence optical polarization observations. Astronomy & Astrophysics. ISSN 0004-6361 (Accepted)

2406.15554v1.pdf - Accepted Version
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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 and 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 in 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.

Item Type: Article
Uncontrolled Keywords: astro-ph.HE; astro-ph.HE
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: EDP Sciences
Related URLs:
SWORD Depositor: A Symplectic
Date Deposited: 26 Jun 2024 09:24
Last Modified: 26 Jun 2024 09:24
URI: https://researchonline.ljmu.ac.uk/id/eprint/23633
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