高光学与X射线偏振比揭示蝎虎座BL天体喷流中的康普顿散射
高能天体物理现象
2025-05-06 v1 宇宙学与河外天体物理
星系天体物理
摘要
耀变体是拥有与视线方向对齐的高度相对论性喷流的超大质量黑洞系统，是宇宙中最强大的长寿命电磁辐射源。我们在此报告了对耀变体蝎虎座BL天体进行的一次从射电到伽马射线的多波段观测活动，该活动在从射电到X射线波段提供了前所未有的偏振覆盖。观测捕捉到了2023年11月10日至18日期间的一次非凡事件，当时光学同步辐射的线偏振度达到了47.5%的创纪录值。与此形成鲜明对比的是，成像X射线偏振测量探测器（IXPE）发现X射线（康普顿散射或强子诱导）辐射的偏振度低于7.4%（3σ置信水平）。我们在此论证，这一观测结果排除了高能辐射的强子起源，并强烈支持轻子（康普顿散射）起源，从而打破了蝎虎座BL天体强子和轻子辐射模型之间的简并性，并展示了多波段偏振测量解决这一问题的能力。此外，多波段流量和偏振变化，其特点是光学偏振度极其显著的上升和衰减，首次被解释为新注入等离子体中嵌入的磁“弹簧”的松弛。这表明等离子体喷流可以在距离中心引擎秒差距之外保持主要的环形磁场分量。
引用
@article{arxiv.2505.01832,
title = {High optical to X-ray polarization ratio reveals Compton scattering in BL Lacertae's jet},
author = {Ivan Agudo and Ioannis Liodakis and Jorge Otero-Santos and Riccardo Middei and Alan Marscher and Svetlana Jorstad and Haocheng Zhang and Hui Li and Laura Di Gesu and Roger W. Romani and Dawoon E. Kim and Francesco Fenu and Herman L. Marshall and Luigi Pacciani and Juan Escudero Pedrosa and Francisco Jose Aceituno and Beatriz Agis-Gonzalez and Giacomo Bonnoli and Victor Casanova and Daniel Morcuende and Vilppu Piirola and Alfredo Sota and Pouya M. Kouch and Elina Lindfors and Callum McCall and Helen E. Jermak and Iain A. Steele and George A. Borman and Tatiana S. Grishina and Vladimir A. Hagen-Thorn and Evgenia N. Kopatskaya and Elena G. Larionova and Daria A. Morozova and Sergey S. Savchenko and Ekaterina V. Shishkina and Ivan S. Troitskiy and Yulia V. Troitskaya and Andrey A. Vasilyev and Alexey V. Zhovtan and Ioannis Myserlis and Mark Gurwell and Garrett Keating and Ramprasad Rao and Sincheol Kang and Sang-Sung Lee and Sanghyun Kim and Whee Yeon Cheong and Hyeon-Woo Jeong and Emmanouil Angelakis and Alexander Kraus and Dmitry Blinov and Siddharth Maharana and Rumen Bachev and Jenni Jormanainen and Kari Nilsson and Vandad Fallah Ramazani and Carolina Casadio and Antonio Fuentes and Efthalia Traianou and Clemens Thum and Jose L. Gomez and Lucio Angelo Antonelli and Matteo Bachetti and Luca Baldini and Wayne H. Baumgartner and Ronaldo Bellazzini and Stefano Bianchi and Stephen D. Bongiorno and Raffaella Bonino and Alessandro Brez and Niccolo Bucciantini and Fiamma Capitanio and Simone Castellano and Elisabetta Cavazzuti and Chien-Ting Chen and Stefano Ciprini and Enrico Costa and Alessandra De Rosa and Ettore Del Monte and Niccolo Di Lalla and Alessandro Di Marco and Immacolata Donnarumma and Victor Doroshenko and Michal Dovciak and Steven R. Ehlert and Teruaki Enoto and Yuri Evangelista and Sergio Fabiani and Riccardo Ferrazzoli and Javier A. Garcia and Shuichi Gunji and Kiyoshi Hayashida and Jeremy Heyl and Wataru Iwakiri and Philip Kaaret and Vladimir Karas and Fabian Kislat and Takao Kitaguchi and Jeffery J. Kolodziejczak and Henric Krawczynski and Fabio La Monaca and Luca Latronico and Simone Maldera and Alberto Manfreda and Frederic Marin and Andrea Marinucci and Francesco Massaro and Giorgio Matt and Ikuyuki Mitsuishi and Tsunefumi Mizuno and Fabio Muleri and Michela Negro and Chi-Yung Ng and Stephen L. O'Dell and Nicola Omodei and Chiara Oppedisano and Alessandro Papitto and George G. Pavlov and Abel L. Peirson and Matteo Perri and Melissa Pesce-Rollins and Pierre-Olivier Petrucci and Maura Pilia and Andrea Possenti and Juri Poutanen and Simonetta Puccetti and Brian D. Ramsey and John Rankin and Ajay Ratheesh and Oliver J. Roberts and Carmelo Sgro and Patrick Slane and Paolo Soffitta and Gloria Spandre and Douglas A. Swartz and Toru Tamagawa and Fabrizio Tavecchio and Roberto Taverna and Yuzuru Tawara and Allyn F. Tennant and Nicholas E. Thomas and Francesco Tombesi and Alessio Trois and Sergey S. Tsygankov and Roberto Turolla and Jacco Vink and Martin C. Weisskopf and Kinwah Wu and Fei Xie and Silvia Zane},
journal= {arXiv preprint arXiv:2505.01832},
year = {2025}
}
备注
Accepted for publication in ApJ Letters