追踪 PG 1553+113 的宽带极化特性
高能天体物理现象
2026-05-14 v1 高能物理 - 唯象学
摘要
我们报告了对 PG 1553+113 的九个月监测计划，依托于2025年三次使用成像 X 射线极化探测仪器（IXPE）所进行的观测，并得到多波段设施的支持。该源在电磁波谱中显示出显著的变动，X 射线通量变化可达约5倍，且光学极化性质呈现复杂演化，包括记录下来的一种最大的（超过 ）和最快的电向量位角（EVPA）旋转。这种 EVPA 的旋转也伴随着光学极化程度暂时下降至接近零。观察到显著的 X 射线极化，在第三次观测中，极化程度为 ，偏振角为 （位于 2--8 keV 能段），而在前两次观测中仅获得上限。光学数据显示，第二次 IXPE 观测发生在一次 dramatic 的光学极化事件之后，这一事件以快速的 EVPA 旋转和强烈的去极化特征为特征。可能解释这种宽带极化行为的两种情形：(i) 两个 nearly 正交磁场配置的发射区的叠加，其相对贡献可变；(ii) 单个发射区与一次冲击的相互作用，暂时重新排序磁场。两种情况下，数据都支持一种模型，即 X 射线和光学发射来自于在动态演化的、磁场结构化的喷流中的彼此密切但并非严格共位置的区域。
引用
@article{arxiv.2605.12602,
title = {Tracking down the broadband polarimetric properties of PG 1553+113},
author = {Riccardo Middei and Svetlana G. Jorstad and Alan P. Marscher and Ioannis Liodakis and Matteo Perri and Alessandro Maselli and Stefano Ciprini and Emanuele Nardini and Simonetta Puccetti and Laura Di Gesu and Iván Agudo and Dawoon E. Kim and Ioannis Myserlis and A. Trindade Falcão and D. Ł. Król and Lucio A. Antonelli and Tommaso Aniello and Pouya M. Kouch and Kari Nilsson and Elina Lindfors and Tapio Pursimo and Francisco José Aceituno and Víctor Casanova and Gabriel Emery and Juan Escudero Pedrosa and Jorge Otero-Santos and Alfredo Sota and Vilppu Piirola 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 Petra Benke and Lena Debbrecht and Julia Eich and Florian Eppel and Andrea Gokus and Steven Hämmerich and Jonas Heßdörfer and Matthias Kadler and Dana Kirchner and Georgios F. Paraschos and Florian Rösch and Wladislaw Schulga and Mark Gurwell and Garrett Keating and Ramprasad Rao and Emmanouil Angelakis and Alexander Kraus and Beatriz Agís-González and Dmitry Blinov and Anastasia Glykopoulou and Sara Capecchiacci and Alberto Floris and Panagiotis Fotis and Alkmini Koukoutsi and John A. Kypriotakis and Dimitrios A. Langis and Dimitrios Rompogiannakis and Aristeidis Polychronakis and Vasiliki Tsioupli and Stavros Vogiatzis and Orestis Zoumpoulakis and Sumie Tochihara and Ryo Imazawa and Mahito Sasada and Yasushi Fukazawa and Koji S. Kawabata and Makoto Uemura and Tsunefumi Mizuno and Tatsuya Nakaoka and Hiroshi Akitaya and Takahiro Akai},
journal= {arXiv preprint arXiv:2605.12602},
year = {2026}
}
备注
accepted for publication in ApJ, 20 pages, 7 figures, and 4 tables