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Determining the origin of the X-ray emission in blazars through multiwavelength polarization

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arxiv 2505.13603 v2 pith:IZNBUJOX submitted 2025-05-19 astro-ph.HE

Ioannis Liodakis , Haocheng Zhang , Stella Boula , Riccardo Middei , Jorge Otero-Santos , Dmitry Blinov , Iván Agudo , Markus Böttcher
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Chien-Ting Chen Steven R. Ehlert Svetlana G. Jorstad Philip Kaaret Henric Krawczynski Abel L. Peirson Roger W. Romani Fabrizio Tavecchio Martin C. Weisskopf Pouya M. Kouch Elina Lindfors Kari Nilsson Callum McCall Helen E. Jermak Iain A. Steele Ioannis Myserlis Mark Gurwell Garrett K. Keating Ramprasad Rao Sincheol Kang Sang-Sung Lee Sanghyun Kim Whee Yeon Cheong Hyeon-Woo Jeong Emmanouil Angelakis Alexander Kraus Francisco José Aceituno Giacomo Bonnoli Víctor Casanova Juan Escudero Beatriz Agís-González Daniel Morcuende Alfredo Sota Rumen Bachev Tatiana S. Grishina Evgenia N. Kopatskaya Elena G. Larionova Daria A. Morozova Sergey S. Savchenko Ekaterina V. Shishkina Ivan S. Troitskiy Yulia V. Troitskaya Andrey A. Vasilyev
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classification astro-ph.HE
keywords emissionpolarizationx-rayobservationsblackholesjetsmodels
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abstract

The origin of the high-energy emission in astrophysical jets from black holes is a highly debated issue. This is particularly true for jets from supermassive black holes that are among the most powerful particle accelerators in the Universe. So far, the addition of new observations and new messengers have only managed to create more questions than answers. However, the newly available X-ray polarization observations promise to finally distinguish between emission models. We use extensive multiwavelength and polarization campaigns as well as state-of-the-art polarized spectral energy distribution models to attack this problem by focusing on two X-ray polarization observations of blazar BL Lacertae in flaring and quiescent $\gamma$-ray states. We find that regardless of the jet composition and underlying emission model, inverse-Compton scattering from relativistic electrons dominates at X-ray energies.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Testing the Correlations between X-ray Spectral Properties and Polarization for High Synchrotron Peaked Blazars

    astro-ph.HE 2025-06 conditional novelty 6.0 of 10

    Across 18 IXPE observations of 7 high-synchrotron-peaked blazars, X-ray spectral slope, curvature, and synchrotron peak energy show no statistically significant correlation with X-ray polarization degree or the X-ray-...

  2. Do multifrequency polarimetric observations of BL Lac rule out a hadronic origin for its X-ray emission?

    astro-ph.HE 2025-05 conditional novelty 5.0 of 10

    A proton-synchrotron model with a magnetized, parabolic jet naturally reproduces the low X-ray polarization and high optical polarization of BL Lac.

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