| Title: |
X-ray Polarization of the Black Hole X-ray Binary 4U 1630-47 Challenges Standard Thin Accretion Disk Scenario |
| Authors: |
Ratheesh, Ajay, Dovčiak, Michal, Krawczynski, Henric, Podgorný, Jakub, Marra, Lorenzo, Veledina, Alexandra, Suleimanov, Valery, Cavero, Nicole Rodriguez, Steiner, James, Svoboda, Jiri, Marinucci, Andrea, Bianchi, Stefano, Negro, Michela, Matt, Giorgio, Tombesi, Francesco, Poutanen, Juri, Ingram, Adam, Taverna, Roberto, West, Andrew, Karas, Vladimir, Ursini, Francesco, Soffitta, Paolo, Capitanio, Fiamma, Viscolo, Domenico, Manfreda, Alberto, Muleri, Fabio, Parra, Maxime, Beheshtipour, Banafsheh, Chun, Sohee, Cibrario, Niccolò, Di Lalla, Niccolò, Fabiani, Sergio, Hu, Kun, Kaaret, Philip, Loktev, Vladislav, Mikušincová, Romana, Mizuno, Tsunefumi, Omodei, Nicola, Petrucci, Pierre-Olivier, Puccetti, Simonetta, Rankin, John, Zane, Silvia, Zhang, Sixuan, Agudo, Iván, Antonelli, Lucio, Bachetti, Matteo, Baldini, Luca, Baumgartner, Wayne, Bellazzini, Ronaldo, Bongiorno, Stephen, Bonino, Raffaella, Brez, Alessandro, Bucciantini, Niccolò, Castellano, Simone, Cavazzuti, Elisabetta, Chen, Chien-Ting, Ciprini, Stefano, Costa, Enrico, De Rosa, Alessandra, Del Monte, Ettore, Di Gesu, Laura, Di Marco, Alessandro, Donnarumma, Immacolata, Doroshenko, Victor, Ehlert, Steven, Enoto, Teruaki, Evangelista, Yuri, Ferrazzoli, Riccardo, Garcia, Javier, Gunji, Shuichi, Hayashida, Kiyoshi, Heyl, Jeremy, Iwakiri, Wataru, Jorstad, Svetlana, Kislat, Fabian, Kitaguchi, Takao, Kolodziejczak, Jeffery, La Monaca, Fabio, Latronico, Luca, Liodakis, Ioannis, Maldera, Simone, Marin, Frédéric, Marscher, Alan, Marshall, Herman, Massaro, Francesco, Mitsuishi, Ikuyuki, Ng, C. -Y., O'Dell, Stephen, Oppedisano, Chiara, Papitto, Alessandro, Pavlov, George, Peirson, Abel, Perri, Matteo, Pesce-Rollins, Melissa, Pilia, Maura, Possenti, Andrea, Ramsey, Brian, Roberts, Oliver, Romani, Roger, Sgrò, Carmelo, Slane, Patrick, Spandre, Gloria, Swartz, Douglas, Tamagawa, Toru, Tavecchio, Fabrizio, Tawara, Yuzuru, Tennant, Allyn, Thomas, Nicholas, Trois, Alessio, Tsygankov, Sergey, Turolla, Roberto, Vink, Jacco, Weisskopf, Martin, Wu, Kinwah, Xie, Fei |
| Source: |
2024 ApJ 964 77 |
| Publication Year: |
2023 |
| Collection: |
Astrophysics |
| Subject Terms: |
Astrophysics - High Energy Astrophysical Phenomena |
| More Details: |
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 $\approx50\sigma$ 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.
Comment: Published in ApJ (https://doi.org/10.3847/1538-4357/ad226e) |
| Document Type: |
Working Paper |
| DOI: |
10.3847/1538-4357/ad226e |
| Access URL: |
http://arxiv.org/abs/2304.12752 |
| Accession Number: |
edsarx.2304.12752 |
| Database: |
arXiv |
