X 射线脉冲星 GRO J1008$-$57 作为正交转子
高能天体物理现象
2023-07-05 v2 太阳与恒星天体物理
摘要
X 射线偏振测量是探测高磁化吸积中子星（X 射线脉冲星）几何构型的独特途径。GRO J100857 是首个在 2022 年 11 月爆发期间由成像 X 射线偏振探测器（IXPE）以两种不同流量水平观测到的暂现 X 射线脉冲星。我们发现 GRO J100857 的偏振性质与其光度无关，偏振度在脉冲相位上于未探测到与约 15% 之间变化。用旋转矢量模型拟合相位分辨的谱偏振数据，使我们能够估计脉冲星倾角（130 度，与轨道倾角吻合良好）、脉冲星自转轴的位置角（75 度）以及磁偏角（74 度）。这使得 GRO J100857 成为首个被确信识别的近正交转子 X 射线脉冲星。我们在中子星大气模型与吸积脉冲星转轴对齐理论的背景下讨论了我们的结果。
引用
@article{arxiv.2302.06680,
title = {X-ray pulsar GRO J1008$-$57 as an orthogonal rotator},
author = {Sergey S. Tsygankov and Victor Doroshenko and Alexander A. Mushtukov and Juri Poutanen and Alessandro Di Marco and Jeremy Heyl and Fabio La Monaca and Sofia Forsblom and Christian Malacaria and Herman L. Marshall and Valery F. Suleimanov and Jiri Svoboda and Roberto Taverna and Francesco Ursini 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 Niccolò 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 Laura Di Gesu and Niccolò Di Lalla and Immacolata Donnarumma 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 Kiyoshi Hayashida and Wataru Iwakiri and Svetlana G. Jorstad and Philip Kaaret and Vladimir Karas and Fabian Kislat 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 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 Lawrence Peirson and Matteo Perri and Melissa Pesce-Rollins and Pierre-Olivier Petrucci 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 Sgrò and Patrick Slane and Paolo Soffitta and Gloria Spandre and Douglas A. Swartz and Toru Tamagawa and Fabrizio Tavecchio 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:2302.06680},
year = {2023}
}
备注
11 pages, 7 figures, A&A, in press