X-ray Polarization of the Black Hole X-ray Binary 4U 1630-47 Challenges Standard Thin Accretion Disk Scenario
Abstract
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 confidence level) of an unexpectedly high polarization, rising from at keV to at 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.
Cite
@article{arxiv.2304.12752,
title = {X-ray Polarization of the Black Hole X-ray Binary 4U 1630-47 Challenges Standard Thin Accretion Disk Scenario},
author = {Ajay Ratheesh and Michal Dovčiak and Henric Krawczynski and Jakub Podgorný and Lorenzo Marra and Alexandra Veledina and Valery Suleimanov and Nicole Rodriguez Cavero and James Steiner and Jiri Svoboda and Andrea Marinucci and Stefano Bianchi and Michela Negro and Giorgio Matt and Francesco Tombesi and Juri Poutanen and Adam Ingram and Roberto Taverna and Andrew West and Vladimir Karas and Francesco Ursini and Paolo Soffitta and Fiamma Capitanio and Domenico Viscolo and Alberto Manfreda and Fabio Muleri and Maxime Parra and Banafsheh Beheshtipour and Sohee Chun and Niccolò Cibrario and Niccolò Di Lalla and Sergio Fabiani and Kun Hu and Philip Kaaret and Vladislav Loktev and Romana Mikušincová and Tsunefumi Mizuno and Nicola Omodei and Pierre-Olivier Petrucci and Simonetta Puccetti and John Rankin and Silvia Zane and Sixuan Zhang and Iván Agudo and Lucio Antonelli and Matteo Bachetti and Luca Baldini and Wayne Baumgartner and Ronaldo Bellazzini and Stephen Bongiorno and Raffaella Bonino and Alessandro Brez and Niccolò 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 Alessandro Di Marco and Immacolata Donnarumma and Victor Doroshenko and Steven Ehlert and Teruaki Enoto and Yuri Evangelista and Riccardo Ferrazzoli and Javier Garcia and Shuichi Gunji and Kiyoshi Hayashida and Jeremy Heyl and Wataru Iwakiri and Svetlana Jorstad and Fabian Kislat and Takao Kitaguchi and Jeffery Kolodziejczak and Fabio La Monaca and Luca Latronico and Ioannis Liodakis and Simone Maldera and Frédéric Marin and Alan Marscher and Herman Marshall and Francesco Massaro and Ikuyuki Mitsuishi and C. -Y. Ng and Stephen O'Dell 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 Brian Ramsey and Oliver Roberts and Roger Romani and Carmelo Sgrò and Patrick Slane and Gloria Spandre and Douglas Swartz and Toru Tamagawa and Fabrizio Tavecchio and Yuzuru Tawara and Allyn Tennant and Nicholas Thomas and Alessio Trois and Sergey Tsygankov and Roberto Turolla and Jacco Vink and Martin Weisskopf and Kinwah Wu and Fei Xie},
journal= {arXiv preprint arXiv:2304.12752},
year = {2024}
}
Comments
Published in ApJ (https://doi.org/10.3847/1538-4357/ad226e)