X-ray Polarization of the Black Hole X-ray Binary 4U 1630-47 Challenges Standard Thin Accretion Disk Scenario
Ajay Ratheesh, Michal Dovčiak, Henric Krawczynski, Jakub Podgorný, Lorenzo Marra, Alexandra Veledina, Valery Suleimanov, Nicole Rodriguez Cavero, James Steiner,… 展开作者
Ajay Ratheesh, Michal Dovčiak, Henric Krawczynski, Jakub Podgorný, Lorenzo Marra, Alexandra Veledina, Valery Suleimanov, Nicole Rodriguez Cavero, James Steiner, Jiri Svoboda, Andrea Marinucci, Stefano Bianchi, Michela Negro, Giorgio Matt, Francesco Tombesi, Juri Poutanen, Adam Ingram, Roberto Taverna, Andrew West, Vladimir Karas, Francesco Ursini, Paolo Soffitta, Fiamma Capitanio, Domenico Viscolo, Alberto Manfreda, Fabio Muleri, Maxime Parra, Banafsheh Beheshtipour, Sohee Chun, Niccolò Cibrario, Niccolò Di Lalla, Sergio Fabiani, Kun Hu, Philip Kaaret, Vladislav Loktev, Romana Mikušincová, Tsunefumi Mizuno, Nicola Omodei, Pierre-Olivier Petrucci, Simonetta Puccetti, John Rankin, Silvia Zane, Sixuan Zhang, Iván Agudo, Lucio Antonelli, Matteo Bachetti, Luca Baldini, Wayne Baumgartner, Ronaldo Bellazzini, Stephen Bongiorno, Raffaella Bonino, Alessandro Brez, Niccolò Bucciantini, Simone Castellano, Elisabetta Cavazzuti, Chien-Ting Chen, Stefano Ciprini, Enrico Costa, Alessandra De Rosa, Ettore Del Monte, Laura Di Gesu, Alessandro Di Marco, Immacolata Donnarumma, Victor Doroshenko, Steven Ehlert, Teruaki Enoto, Yuri Evangelista, Riccardo Ferrazzoli, Javier Garcia, Shuichi Gunji, Kiyoshi Hayashida, Jeremy Heyl, Wataru Iwakiri, Svetlana Jorstad, Fabian Kislat, Takao Kitaguchi, Jeffery Kolodziejczak, Fabio La Monaca, Luca Latronico, Ioannis Liodakis, Simone Maldera, Frédéric Marin, Alan Marscher, Herman Marshall, Francesco Massaro, Ikuyuki Mitsuishi, C. -Y. Ng, Stephen O'Dell, Chiara Oppedisano, Alessandro Papitto, George Pavlov, Abel Peirson, Matteo Perri, Melissa Pesce-Rollins, Maura Pilia, Andrea Possenti, Brian Ramsey, Oliver Roberts, Roger Romani, Carmelo Sgrò, Patrick Slane, Gloria Spandre, Douglas Swartz, Toru Tamagawa, Fabrizio Tavecchio, Yuzuru Tawara, Allyn Tennant, Nicholas Thomas, Alessio Trois, Sergey Tsygankov, Roberto Turolla, Jacco Vink, Martin Weisskopf, Kinwah Wu, Fei Xie
Imaging X-ray Polarimetry Explorer (IXPE)在黑洞X射线双星4U 1630-47的高软发射态中探测到了较大的能量依赖X射线偏振度。这一高显著性探测（置信度约50σ）显示出出乎意料的高偏振，从2 keV时的约6%上升到8 keV时的约10%，难以轻易与标准薄吸积盘模型相调和。在本研究中，我们将不同理论模型的预测与IXPE数据进行比较，得出结论：观测到的偏振性质与以下情景相符，即物质通过薄盘吸积到黑洞上，盘上覆盖着以适度相对论速度向外流动的部分电离大气。
英文摘要：
Large energy-dependent X-ray polarization degree is detected by the Imaging X-ray Polarimetry Explorer ({IXPE}) in the high-soft emission state of the black hole X-ray binary 4U 1630--47. The highly significant detection (at $\approx50σ$ confidence level) of an unexpectedly high polarization, rising from $\sim6\%$ at $2$ keV to $\sim10\%$ at $8$ keV, cannot be easily reconciled with standard models of thin accretion discs. In this work we compare the predictions of different theoretical models with the {IXPE} data and conclude that the observed polarization properties are compatible with a scenario in which matter accretes onto the black hole through a thin disc, covered by a partially-ionized atmosphere flowing away at mildly relativistic velocities.
Polarization properties of thermal accretion disk emission. I. Direct radiation
INAF Istituto di Astrofisica e Planetologia Spaziali（意大利国家天体物理研究所）；Dipartimento di Fisica e Astronomia, Università degli Studi di Padova（帕多瓦大学物理与天文系）；Astronomical Institute of the Czech Academy of Sciences（捷克科学院天文研究所）；Dipartimento di Matematica e Fisica, Università degli Studi Roma Tre（罗马第三大学数学与物理系）；Université de Strasbourg, CNRS, Observatoire Astronomique de Strasbourg, UMR 7550（斯特拉斯堡大学、法国国家科学研究中心、斯特拉斯堡天文台）
Unchanged X-Ray Polarization During Accretion Dips in the Low Hard State of Cygnus X-1
Guangxi University（广西大学）；INAF Istituto di Astrofisica e Planetologia Spaziali（意大利国家天体物理研究所空间天体物理学和行星科学研究所）；Institute of High Energy Physics, Chinese Academy of Sciences（中国科学院高能物理研究所）
Polarization Signatures from GRMHD Simulations of Black Hole Accretion
College of Charleston（查尔斯顿学院）；Center for Computational Astrophysics, Flatiron Institute（纽约市立大学富兰克林研究所计算天体物理学中心）；Instituto de Astrofísica de Andalucía-CSIC（安达卢西亚天体物理研究所-西班牙国家研究委员会）；Research Centre for Computational Physics and Data Processing, Institute of Physics, Silesian University in Opava（奥帕瓦西里西亚大学物理学院计算物理与数据处理研究中心）；Black Hole Initiative at Harvard University（哈佛大学黑洞倡议项目）
Strong Polarization Signatures from Magnetically Stabilized Luminous Thin Accretion Disks
College of Charleston（查尔斯顿学院）；Center for Computational Astrophysics, Flatiron Institute（平顿研究所计算天体物理中心）；Lawrence Livermore National Laboratory（劳伦斯利弗莫尔国家实验室）；University of California, Merced（加州大学默塞德分校）；St. Paul’s School（圣保罗学校）
Polarization Images of Neutron Stars Illuminated by a Thin Accretion Disk: A Comparison with Black Holes
Sichuan Minzu College（四川民族学院）；China West Normal University（西华师范大学）；Chongqing Jiaotong University（重庆交通大学）；Chongqing Bashu Science City Secondary School（重庆巴蜀科学城中学）
