利用 IXPE 偏振测量确定 X 射线脉冲星几何结构
高能天体物理现象
2023-01-16 v3
摘要
利用成像 X 射线偏振探测卫星（IXPE）对 X 射线脉冲星 Her X-1 的观测，我们报告了对吸积中子星偏振信号的高度显著（>17σ）探测。观测到的约 10% 的线偏振度远低于该天体的理论预期，并在脉冲星整个自转周期内保持较低水平。偏振度和偏振角均随脉冲相位变化，这使我们测得脉冲星自转位置角 57(2) 度和磁倾角 12(4) 度，这是迈向 X 射线脉冲星本征辐射详细建模的重要一步。将我们的结果与光学偏振数据结合，我们发现中子星自转轴与双星轨道角动量至少偏离约 20 度，这强烈支持用中子星进动解释所观测到的超轨道变化的模型。
引用
@article{arxiv.2206.07138,
title = {Determination of X-ray pulsar geometry with IXPE polarimetry},
author = {Victor Doroshenko and Juri Poutanen and Sergey S. Tsygankov and Valery F. Suleimanov and Matteo Bachetti and Ilaria Caiazzo and Enrico Costa and Alessandro Di Marco and Jeremy Heyl and Fabio La Monaca and Fabio Muleri and Alexander A. Mushtukov and George G. Pavlov and Brian D. Ramsey and John Rankin and Andrea Santangelo and Paolo Soffitta and Rüdiger Staubert and Martin C. Weisskopf and Silvia Zane and Iván Agudo and Lucio A. Antonelli and Luca Baldini and Wayne H. Baumgartner and Ronaldo Bellazzini and Stefano Bianchi and Stephen D. Bongiorno and Raffaella Bonino and Alessandro Brez and Niccolò Bucciantini and Fiamma Capitanio and Simone Castellano and Elisabetta Cavazzuti and Stefano Ciprini and Alessandra De Rosa and Ettore Del Monte and Laura Di Gesu and Niccolò 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 Vladimir Karas and Takao Kitaguchi and Jeffery J. Kolodziejczak and Henric Krawczynski 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 Giorgio Matt and Ikuyuki Mitsuishi and Tsunefumi Mizuno and C. -Y. Ng and Stephen L. O'Dell and Nicola Omodei and Chiara Oppedisano and Alessandro Papitto and Abel L. Peirson and Matteo Perri and Melissa Pesce-Rollins and Maura Pilia and Andrea Possenti and Simonetta Puccetti and Ajay Ratheesh and Roger W. Romani and Carmelo Sgrò and Patrick Slane and Gloria Spandre and Rashid A. Sunyaev and Toru Tamagawa and Fabrizio Tavecchio and Roberto Taverna and Yuzuru Tawara and Allyn F. Tennant and Nicolas E. Thomas and Francesco Tombesi and Alessio Trois and Roberto Turolla and Jacco Vink and Kinwah Wu and Fei Xie},
journal= {arXiv preprint arXiv:2206.07138},
year = {2023}
}
备注
31 pages 7 figures, published