Title: | Discovery of X-Ray Polarization from the Black Hole Transient Swift J1727.8-1613 |
Authors: | Veledina, Alexandra MULERI, FABIO Dovčiak, Michal Poutanen, Juri RATHEESH, AJAY CAPITANIO, FIAMMA Matt, Giorgio SOFFITTA, PAOLO Tennant, Allyn F. Negro, Michela Kaaret, Philip Roberts, Oliver J. Romani, Roger W. Sgrò, Carmelo Slane, Patrick Spandre, Gloria Swartz, Douglas A. Tamagawa, Toru TAVECCHIO, Fabrizio Taverna, Roberto Tawara, Yuzuru COSTA, ENRICO Thomas, Nicholas E. TROIS, ALESSIO Turolla, Roberto Vink, Jacco Wu, Kinwah XIE, FEI Ingram, Adam Svoboda, Jiří Krawczynski, Henric Bianchi, Stefano Steiner, James F. García, Javier A. Kravtsov, Vadim Nitindala, Anagha P. Ewing, Melissa MASTROSERIO, Guglielmo Marinucci, Andrea Ursini, Francesco TOMBESI, Francesco Tsygankov, Sergey S. Yang, Yi-Jung Weisskopf, Martin C. Trushkin, Sergei A. EGRON, Elise Marie Jeanne IACOLINA, Maria Noemi PILIA, Maura MARRA, Lorenzo MIKUSINCOVA, Romana Nathan, Edward PARRA, Maxime Anselme Joseph Petrucci, Pierre-Olivier Podgorný, Jakub Tugliani, Stefano Zane, Silvia Zhang, Wenda Agudo, Iván ANTONELLI, Lucio Angelo BACHETTI, Matteo Baldini, Luca Baumgartner, Wayne H. Bellazzini, Ronaldo Bongiorno, Stephen D. Bonino, Raffaella Brez, Alessandro BUCCIANTINI, Niccolo' Castellano, Simone Cavazzuti, Elisabetta Chen, Chien-Ting Ciprini, Stefano DE ROSA, Alessandra DEL MONTE, Ettore Di Gesu, Laura Di Lalla, Niccolò DI MARCO, Alessandro Donnarumma, Immacolata Doroshenko, Victor Ehlert, Steven R. Enoto, Teruaki EVANGELISTA, YURI FABIANI, Sergio FERRAZZOLI, Riccardo Gunji, Shuichi Hayashida, Kiyoshi Heyl, Jeremy Iwakiri, Wataru Jorstad, Svetlana G. Karas, Vladimir Kislat, Fabian Kitaguchi, Takao Kolodziejczak, Jeffery J. LA MONACA, Fabio Latronico, Luca Liodakis, Ioannis Maldera, Simone Manfreda, Alberto Marin, Frédéric Marscher, Alan P. Marshall, Herman L. MASSARO, Francesco Mitsuishi, Ikuyuki Mizuno, Tsunefumi Ng, Chi-Yung O'Dell, Stephen L. Omodei, Nicola Oppedisano, Chiara PAPITTO, ALESSANDRO Pavlov, George G. Peirson, Abel L. PERRI, Matteo Pesce-Rollins, Melissa POSSENTI, ANDREA Puccetti, Simonetta Ramsey, Brian D. RANKIN, John |
Issue Date: | 2023 |
Journal: | THE ASTROPHYSICAL JOURNAL LETTERS |
Number: | 958 |
Issue: | 1 |
First Page: | L16 |
Abstract: | We report the first detection of the X-ray polarization of the bright transient Swift J1727.8-1613 with the Imaging X-ray Polarimetry Explorer. The observation was performed at the beginning of the 2023 discovery outburst, when the source resided in the bright hard state. We find a time- and energy-averaged polarization degree of 4.1% ± 0.2% and a polarization angle of 2.°2 ± 1.°3 (errors at 68% confidence level; this translates to ~20σ significance of the polarization detection). This finding suggests that the hot corona emitting the bulk of the detected X-rays is elongated, rather than spherical. The X-ray polarization angle is consistent with that found in submillimeter wavelengths. Since the submillimeter polarization was found to be aligned with the jet direction in other X-ray binaries, this indicates that the corona is elongated orthogonal to the jet. |
URI: | http://hdl.handle.net/20.500.12386/35711 |
URL: | https://api.elsevier.com/content/abstract/scopus_id/85179472583 https://iopscience.iop.org/article/10.3847/2041-8213/ad0781 |
ISSN: | 2041-8205 |
DOI: | 10.3847/2041-8213/ad0781 |
Bibcode ADS: | 2023ApJ...958L..16V |
Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista
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