首次X射线偏振测量确认LMC X-3的低黑洞自旋
高能天体物理现象
2024-06-25 v1
摘要
X射线偏振是探测黑洞周围吸积物质几何结构的有力工具，可独立测量黑洞自旋以及吸积盘最内层的取向。我们对位于大麦哲伦云中的X射线双星系统LMC X-3进行了X射线能谱-偏振分析，该系统宿主一颗恒星级黑洞，自发现以来已知处于持续吸积状态。我们报道了利用成像X射线偏振探测器(Imaging X-ray Polarimetry Explorer)在LMC X-3中首次探测到X射线偏振，并发现其在2-8 keV能段内的平均偏振度为3.2% ± 0.6%，偏振角恒定于-42° ± 6°。利用NICER、NuSTAR和Neil Gehrels Swift天文台的伴随光谱观测，我们通过X射线连续谱方法确认了先前测得的黑洞自旋约0.2。仅从偏振分析出发，我们得到了与低黑洞自旋一致的结果，在90%置信水平下自旋上限 a < 0.7。数据暗示偏振度随能量略有增加，类似于其他处于软态的黑洞X射线双星，但统计显著性较低。
引用
@article{arxiv.2309.10813,
title = {First X-ray polarization measurement confirms the low black-hole spin in LMC X-3},
author = {Jiří Svoboda and Michal Dovčiak and James F. Steiner and Fabio Muleri and Adam Ingram and Anastasiya Yilmaz and Nicole Rodriguez Cavero and Lorenzo Marra and Juri Poutanen and Alexandra Veledina and Mehrnoosh Rahbardar Mojaver and Stefano Bianchi and Javier Garcia and Philip Kaaret and Henric Krawczynski and Giorgio Matt and Jakub Podgorný and Martin C. Weisskopf and Fabian Kislat and Pierre-Olivier Petrucci and Maimouna Brigitte and Michal Bursa and Sergio Fabiani and Kun Hu and Sohee Chun and Guglielmo Mastroserio and Romana Mikušincová and Ajay Ratheesh and Roger W. Romani and Paolo Soffitta and Francesco Ursini and Silvia Zane and Iván Agudo and Lucio A. Antonelli and Matteo Bachetti and Luca Baldini and Wayne H. Baumgartner and Ronaldo Bellazzini and Stephen D. Bongiorno and Raffaella Bonino and Alessandro Brez and Niccolo 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 Niccolo Di Lalla and Alessandro Di Marco and Immacolata Donnarumma and Victor Doroshenko and Steven Ehlert and Teruaki Enoto and Yuri Evangelista and Riccardo Ferrazzoli and Shuichi Gunji and Kiyoshi Hayashida and Jeremy Heyl and Wataru Iwakiri and Svetlana G. Jorstad and Vladimír Karas and Takao Kitaguchi and Jeffery Kolodziejczak 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 Ikuyuki Mitsuishi and Tsunefumi Mizuno and Michela Negro and C. -Y. Ng and Stephen L. O'Dell and Nicola Omodei and Chiara Oppedisano and Alessandro Papitto and George Pavlov and Abel 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 Oliver Roberts and Carmelo Sgro and Patrick Slane 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 S. Tsygankov and Roberto Turolla and Jacco Vink and Kinwah Wu and Fei Xie},
journal= {arXiv preprint arXiv:2309.10813},
year = {2024}
}
备注
14 pages, 8 figures, submitted to ApJ