基于更深 IXPE 观测的 Crab X 射线极化分析
高能天体物理现象
2024-07-18 v1
摘要
我们采用总曝光量为300千秒（三倍于2022年发现论文的初始观测）的IXPE数据，对Crab X射线极化进行测量。极化在三倍于以往的脉冲相位分bin中被检测到，揭示了主脉冲中40度极化角扫掠的S型曲线，并且在两个脉冲中均观测到的偏离OPTIMA光学极化，暗示两种波段的极化发射可能具有不同的辐射机制或发射位置。我们的内 nebula极化图显示出现了环形磁场，与此前的IXPE分析一致。在南方喷流上，磁场方向相对于喷流轴的变化从垂直变为平行，极化度下降约。这些观测可由喷流沿线的皱卷 instability或喷流尖端与密集喷流偏转介质的碰撞解释。利用谱极化分析，我们发现内 nebula的四个象限之间存在不对称的极化，预期于环形磁场几何结构相符，并且极化度与光子指数之间存在空间相关性。
引用
@article{arxiv.2407.12779,
title = {Analysis of Crab X-ray Polarization using Deeper IXPE Observations},
author = {Josephine Wong and Tsunefumi Mizuno and Niccoló Bucciantini and Roger W. Romani and Yi-Jung Yang and Kuan Liu and Wei Deng and Kazuho Goya and Fei Xie and Maura Pilia and Philip Kaaret and Martin C. Weisskopf and Stefano Silvestri and C. -Y. Ng and Chien-Ting Chen and Iván Agudo and Lucio A. 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 Fiamma Capitanio and Simone Castellano and Elisabetta Cavazzuti and Stefano Ciprini and Enrico Costa and Alessandra De Rosa and Ettore Del Monte and Laura Di Gesu and Niccoló Di Lalla and Alessandro Di Marco and Immacolata Donnarumma and Victor Doroshenko and Michal Dovčiak and Steven R. Ehlert and Teruaki Enoto and Yuri Evangelista and Sergio Fabiani and Riccardo Ferrazzoli and Javier A. Garcia and Shuichi Gunji and Jeremy Heyl and Wataru Iwakiri and Svetlana G. Jorstad and Vladimir Karas and Fabian Kislat and Takao Kitaguchi and Jeffery J. Kolodziejczak and Henric Krawczynski and Fabio La Monaca and Luca Latronico and Ioannis Liodakis and Simone Maldera and Alberto Manfreda and Frédéric Marin and Andrea Marinucci and Alan P. Marscher and Herman L. Marshall and Francesco Massaro and Giorgio Matt and Ikuyuki Mitsuishi and Fabio Muleri and Michela Negro and Stephen L. O'Dell and Nicola Omodei and Chiara Oppedisano and Alessandro Papitto and George G. Pavlov and Abel Lawrence Peirson and Matteo Perri and Melissa Pesce-Rollins and Pierre-Olivier Petrucci 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 Sgró 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 Tsygankov and Roberto Turolla and Jacco Vink and Kinwah Wu and Silvia Zane},
journal= {arXiv preprint arXiv:2407.12779},
year = {2024}
}
备注
14 pages, 7 figures, 3 tables. Accepted by The Astrophysical Journal