X-Ray Polarization of the Black Hole X-Ray Binary 4U 1630–47 Challenges the Standard Thin Accretion Disk Scenario
Creators: name: Ratheesh, Ajay
name: Dov?Iak, Michal
name: Krawczynski, Henric
name: Podgorný, Jakub
name: Marra, Lorenzo
name: Veledina, Alexandra
name: Suleimanov, Valery F.
name: Cavero, Nicole Rodriguez
name: Steiner, James F.
name: Svoboda, Ji?í
name: Marinucci, Andrea
name: Bianchi, Stefano
name: Negro, Michela
name: Matt, Giorgio
name: Tombesi, Francesco
name: Poutanen, Juri
name: Ingram, Adam
name: Taverna, Roberto
name: West, Andrew
name: Karas, Vladimir
name: Ursini, Francesco
name: Soffitta, Paolo
name: Capitanio, Fiamma
name: Viscolo, Domenico
name: Manfreda, Alberto
name: Muleri, Fabio
name: Parra, Maxime
name: Beheshtipour, Banafsheh
name: Chun, Sohee
name: Cibrario, Nicolò
name: Lalla, Niccolò Di
name: Fabiani, Sergio
name: Hu, Kun
name: Kaaret, Philip
name: Loktev, Vladislav
name: Mikušincová, Romana
name: Mizuno, Tsunefumi
name: Omodei, Nicola
name: Petrucci, Pierre-Olivier
name: Puccetti, Simonetta
name: Rankin, John
name: Zane, Silvia
name: Zhang, Sixuan
name: Agudo, Iván
name: Antonelli, Lucio A.
name: Bachetti, Matteo
name: Baldini, Luca
name: Baumgartner, Wayne H.
name: Bellazzini, Ronaldo
name: Bongiorno, Stephen D.
name: Bonino, Raffaella
name: Brez, Alessandro
name: Bucciantini, Niccolò
name: Castellano, Simone
name: Cavazzuti, Elisabetta
name: Chen, Chien-Ting
name: Ciprini, Stefano
name: Costa, Enrico
name: Rosa, Alessandra De
name: Monte, Ettore Del
name: Gesu, Laura Di
name: Marco, Alessandro Di
name: Donnarumma, Immacolata
name: Doroshenko, Victor
name: Ehlert, Steven R.
name: Enoto, Teruaki
name: Evangelista, Yuri
name: Ferrazzoli, Riccardo
name: Garcia, Javier A.
name: Gunji, Shuichi
name: Hayashida, Kiyoshi
name: Heyl, Jeremy
name: Iwakiri, Wataru
name: Jorstad, Svetlana G.
name: Kislat, Fabian
name: Kitaguchi, Takao
name: Kolodziejczak, Jeffery J.
name: Monaca, Fabio La
name: Latronico, Luca
name: Liodakis, Ioannis
name: Maldera, Simone
name: Marin, Frédéric
name: Marscher, Alan P.
name: Marshall, Herman L.
name: Massaro, Francesco
name: Mitsuishi, Ikuyuki
name: Ng, Stephen C.-Y.
name: O’Dell, Stephen L.
name: Oppedisano, Chiara
name: Papitto, Alessandro
name: Pavlov, George G.
name: Peirson, Abel L.
name: Perri, Matteo
name: Pesce-Rollins, Melissa
name: Pilia, Maura
name: Possenti, Andrea
name: Ramsey, Brian D.
name: Roberts, Oliver J.
name: Romani, Roger W.
name: Sgrò, Carmelo
name: Slane, Patrick
name: Spandre, Gloria
name: Swartz, Douglas A.
name: Tamagawa, Toru
name: Tavecchio, Fabrizio
name: Tawara, Yuzuru
name: Tennant, Allyn F.
name: Thomas, Nicholas E.
name: Trois, Alessio
name: Tsygankov, Sergey S.
name: Turolla, Roberto
name: Vink, Jacco
name: Weisskopf, Martin C.
name: Wu, Kinwah
name: Xie, Fei
Publisher: name: AAS
Year: 2024

description: A 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 ?50? confidence level) of an unexpectedly high polarization, rising from ?6% at 2 keV to ?10% at 8 keV, cannot be easily reconciled with standard models of thin accretion disks. 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 disk covered by a partially ionized atmosphere flowing away at mildly relativistic velocities.