对吸积脉冲星 EXO 2030+375 的偏振定向 X 射线凝视观测
高能天体物理现象
2023-07-12 v2
摘要
吸积 X 射线脉冲星(XRP)大概是偏振测量的理想目标，因其强磁场预期可使辐射偏振度高达约 80%。然而，近期利用成像 X 射线偏振探测器(IXPE)对 XRP 的观测正挑战此类预期。本文报道另一颗 XRP——EXO 2030+375——的观测结果，该源由 IXPE 观测，并由 Insight-HXMT 与 SRG/ART-XC 同期监测。与 IXPE 对类似源近期所得结果一致，对 EXO 2030+375 数据的分析在相位平均研究中返回 0%–3% 的低偏振度，在相位分辨研究中返回 2%–7% 的变化范围。利用旋转矢量模型我们约束了系统几何，得到磁倾角约 。结合估计的脉冲星倾角约 ，这表明磁轴摆动至接近观测者视线。我们的偏振、能谱与计时联合分析暗示一种复杂吸积几何，其中具非对称拓扑的磁多极与引力光线弯曲显著影响了所观测源的性行为。
引用
@article{arxiv.2304.00925,
title = {A polarimetrically oriented X-ray stare at the accreting pulsar EXO 2030+375},
author = {Christian Malacaria and Jeremy Heyl and Victor Doroshenko and Sergey S. Tsygankov and Juri Poutanen and Sofia V. Forsblom and Fiamma Capitanio and Alessandro Di Marco and Yujia Du and Lorenzo Ducci and Fabio La Monaca and Alexander A. Lutovinov and Herman L. Marshall and Ilya A. Mereminskiy and Sergey V. Molkov and Mason Ng and Pierre-Olivier Petrucci and Andrea Santangelo and Andrey E. Shtykovsky and Valery F. Suleimanov and Ivan 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 Niccolo Bucciantini 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 Laura Di Gesu and Niccolo Di Lalla and Immacolata Donnarumma 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 Wataru Iwakiri and Svetlana G. Jorstad and Philip Kaaret and Vladimir Karas and Fabian Kislat and Takao Kitaguchi and Jeffery J. Kolodziejczak1 and Henric Krawczynski and Luca Latronico and Ioannis Liodakis and Simone Maldera and Alberto Manfreda and Frederic Marin and Andrea Marinucci and Alan P. Marscher 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 Maura Pilia and Andrea Possenti and Simonetta Puccetti and Brian D. Ramsey and John Rankin and Ajay Ratheesh and Oliver J. Roberts and Roger W. Romani 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 Roberto Turolla and Jacco Vink and Martin C. Weisskopf and Kinwah Wu and Fei Xie and Silvia Zane},
journal= {arXiv preprint arXiv:2304.00925},
year = {2023}
}
备注
A&A accepted. Proofs version