Polarized x-rays constrain the disk-jet geometry in the black hole x-ray binary Cygnus X-1

Journal
Date Issued
2022
Author(s)
Krawczynski, Henric
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Dovčiak, Michal
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Veledina, Alexandra
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Rodriguez Cavero, Nicole
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Svoboda, Jiri
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Ingram, Adam
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Garcia, Javier A.
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Loktev, Vladislav
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Negro, Michela
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Slane, Patrick
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Spandre, Gloria
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Tamagawa, Toru
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Taverna, Roberto
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Tawara, Yuzuru
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Thomas, Nicholas E.
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Tsygankov, Sergey
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Turolla, Roberto
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Poutanen, Juri
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Vink, Jacco
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Wu, Kinwah
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Zane, Silvia
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Kitaguchi, Takao
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Podgorný, Jakub
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Zhang, Wenda
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Berdyugin, Andrei
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Berdyugina, Svetlana V.
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Bianchi, Stefano
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Blinov, Dmitry
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Di Lalla, Niccolò
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Draghis, Paul
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Kagitani, Masato
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Kravtsov, Vadim
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Kiehlmann, Sebastian
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Latronico, Luca
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Lutovinov, Alexander A.
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Mandarakas, Nikos
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Marin, Frédéric
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Marinucci, Andrea
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Miller, Jon M.
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Mizuno, Tsunefumi
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Molkov, Sergey V.
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Omodei, Nicola
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Petrucci, Pierre-Olivier
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Sakanoi, Takeshi
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Semena, Andrei N.
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Skalidis, Raphael
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Tennant, Allyn F.
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Thalhammer, Phillipp
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Weisskopf, Martin C.
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Wilms, Joern
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Zhang, Sixuan
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Agudo, Iván
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Baldini, Luca
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Baumgartner, Wayne H.
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Bellazzini, Ronaldo
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Bongiorno, Stephen D.
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Bonino, Raffaella
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Brez, Alessandro
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Castellano, Simone
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Cavazzuti, Elisabetta
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Ciprini, Stefano
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Di Gesu, Laura
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Donnarumma, Immacolata
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Doroshenko, Victor
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Ehlert, Steven R.
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Enoto, Teruaki
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Gunji, Shuichi
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Hayashida, Kiyoshi
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Heyl, Jeremy
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Iwakiri, Wataru
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Jorstad, Svetlana G.
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Karas, Vladimir
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Kolodziejczak, Jeffery J.
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Liodakis, Ioannis
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Maldera, Simone
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Manfreda, Alberto
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Marscher, Alan P.
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Marshall, Herman L.
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Mitsuishi, Ikuyuki
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Ng, Chi-Yung
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O’Dell, Stephen L.
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Oppedisano, Chiara
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Pavlov, George G.
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Peirson, Abel L.
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Pesce-Rollins, Melissa
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Puccetti, Simonetta
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Ramsey, Brian D.
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Romani, Roger W.
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Sgrò, Carmelo
DOI
Abstract
A black hole x-ray binary (XRB) system forms when gas is stripped from a normal star and accretes onto a black hole, which heats the gas sufficiently to emit x-rays. We report a polarimetric observation of the XRB Cygnus X-1 using the Imaging X-ray Polarimetry Explorer. The electric field position angle aligns with the outflowing jet, indicating that the jet is launched from the inner x-ray–emitting region. The polarization degree is 4.01 ± 0.20% at 2 to 8 kiloelectronvolts, implying that the accretion disk is viewed closer to edge-on than the binary orbit. These observations reveal that hot x-ray–emitting plasma is spatially extended in a plane perpendicular to, not parallel to, the jet axis....
Volume
378
Issue
6620
Start page
650
Uri
Url
Issn Identifier
0036-8075
Rights
open.access
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