eprintid: 10196156 rev_number: 8 eprint_status: archive userid: 699 dir: disk0/10/19/61/56 datestamp: 2024-08-22 17:02:26 lastmod: 2024-12-22 07:10:10 status_changed: 2024-08-22 17:02:26 type: article metadata_visibility: show sword_depositor: 699 creators_name: Veledina, Alexandra creators_name: Muleri, Fabio creators_name: Poutanen, Juri creators_name: Podgorný, Jakub creators_name: Dovčiak, Michal creators_name: Capitanio, Fiamma creators_name: Churazov, Eugene creators_name: De Rosa, Alessandra creators_name: Di Marco, Alessandro creators_name: Forsblom, Sofia V creators_name: Kaaret, Philip creators_name: Krawczynski, Henric creators_name: La Monaca, Fabio creators_name: Loktev, Vladislav creators_name: Lutovinov, Alexander A creators_name: Molkov, Sergey V creators_name: Mushtukov, Alexander A creators_name: Ratheesh, Ajay creators_name: Rodriguez Cavero, Nicole creators_name: Steiner, James F creators_name: Sunyaev, Rashid A creators_name: Tsygankov, Sergey S creators_name: Weisskopf, Martin C creators_name: Zdziarski, Andrzej A creators_name: Bianchi, Stefano creators_name: Bright, Joe S creators_name: Bursov, Nikolaj creators_name: Costa, Enrico creators_name: Egron, Elise creators_name: Garcia, Javier A creators_name: Green, David A creators_name: Gurwell, Mark creators_name: Ingram, Adam creators_name: Kajava, Jari JE creators_name: Kale, Ruta creators_name: Kraus, Alex creators_name: Malyshev, Denys creators_name: Marin, Frédéric creators_name: Matt, Giorgio creators_name: McCollough, Michael creators_name: Mereminskiy, Ilya A creators_name: Nizhelsky, Nikolaj creators_name: Piano, Giovanni creators_name: Pilia, Maura creators_name: Pittori, Carlotta creators_name: Rao, Ramprasad creators_name: Righini, Simona creators_name: Soffitta, Paolo creators_name: Shevchenko, Anton creators_name: Svoboda, Jiri creators_name: Tombesi, Francesco creators_name: Trushkin, Sergei A creators_name: Tsybulev, Peter creators_name: Ursini, Francesco creators_name: Wu, Kinwah creators_name: Agudo, Iván creators_name: Antonelli, Lucio A creators_name: Bachetti, Matteo creators_name: Baldini, Luca creators_name: Baumgartner, Wayne H creators_name: Bellazzini, Ronaldo creators_name: Bongiorno, Stephen D creators_name: Bonino, Raffaella creators_name: Brez, Alessandro creators_name: Bucciantini, Niccolò creators_name: Castellano, Simone creators_name: Cavazzuti, Elisabetta creators_name: Chen, Chien-Ting creators_name: Ciprini, Stefano creators_name: Del Monte, Ettore creators_name: Di Gesu, Laura creators_name: Di Lalla, Niccolò creators_name: Donnarumma, Immacolata creators_name: Doroshenko, Victor creators_name: Ehlert, Steven R creators_name: Enoto, Teruaki creators_name: Evangelista, Yuri creators_name: Fabiani, Sergio creators_name: Ferrazzoli, Riccardo creators_name: Gunji, Shuichi creators_name: Hayashida, Kiyoshi creators_name: Heyl, Jeremy creators_name: Iwakiri, Wataru creators_name: Jorstad, Svetlana G creators_name: Karas, Vladimir creators_name: Kislat, Fabian creators_name: Kitaguchi, Takao creators_name: Kolodziejczak, Jeffery J creators_name: Latronico, Luca creators_name: Liodakis, Ioannis creators_name: Maldera, Simone creators_name: Manfreda, Alberto creators_name: Marinucci, Andrea creators_name: Marscher, Alan P creators_name: Marshall, Herman L creators_name: Massaro, Francesco creators_name: Mitsuishi, Ikuyuki creators_name: Mizuno, Tsunefumi creators_name: Negro, Michela creators_name: Ng, Chi-Yung creators_name: O’Dell, Stephen L creators_name: Omodei, Nicola creators_name: Oppedisano, Chiara creators_name: Papitto, Alessandro creators_name: Pavlov, George G creators_name: Peirson, Abel L creators_name: Perri, Matteo creators_name: Pesce-Rollins, Melissa creators_name: Petrucci, Pierre-Olivier creators_name: Possenti, Andrea creators_name: Puccetti, Simonetta creators_name: Ramsey, Brian D creators_name: Rankin, John creators_name: Roberts, Oliver creators_name: Romani, Roger W creators_name: Sgrò, Carmelo creators_name: Slane, Patrick creators_name: Spandre, Gloria creators_name: Swartz, Doug creators_name: Tamagawa, Toru creators_name: Tavecchio, Fabrizio creators_name: Taverna, Roberto creators_name: Tawara, Yuzuru creators_name: Tennant, Allyn F creators_name: Thomas, Nicholas E creators_name: Trois, Alessio creators_name: Turolla, Roberto creators_name: Vink, Jacco creators_name: Xie, Fei creators_name: Zane, Silvia title: Cygnus X-3 revealed as a Galactic ultraluminous X-ray source by IXPE ispublished: pub divisions: UCL divisions: B04 divisions: C06 divisions: F63 keywords: Compact astrophysical objects, High-energy astrophysics note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. abstract: The accretion of matter by compact objects can be inhibited by radiation pressure if the luminosity exceeds a critical value known as the Eddington limit. The discovery of ultraluminous X-ray sources has shown that accretion can proceed even when the apparent luminosity considerably exceeds this limit. A high apparent luminosity might be produced due to the geometric beaming of radiation by an outflow. The outflow half-opening angle, which determines the amplification due to beaming, has never been robustly constrained. Using the Imaging X-ray Polarimetry Explorer, we measured the X-ray polarization in the Galactic X-ray binary Cygnus X-3 (Cyg X-3). We found high, >20%, nearly energy-independent linear polarization orthogonal to the direction of the radio ejections. These properties unambiguously indicate the presence of a collimating outflow from the X-ray binary Cyg X-3 and constrain its half-opening angle to ≲15°. Thus, the source can be used as a laboratory for studying the supercritical accretion regime. This finding underscores the importance of X-ray polarimetry in advancing our understanding of accreting sources. date: 2024-08 date_type: published publisher: Springer Science and Business Media LLC official_url: https://doi.org/10.1038/s41550-024-02294-9 oa_status: green full_text_type: other language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 2305486 doi: 10.1038/s41550-024-02294-9 lyricists_name: Zane, Silvia lyricists_name: Wu, Kinwah lyricists_id: SZANE58 lyricists_id: KWUXX50 actors_name: Allington-Smith, Dominic actors_id: DAALL44 actors_role: owner full_text_status: public publication: Nature Astronomy volume: 8 pagerange: 1031-1046 issn: 2397-3366 citation: Veledina, Alexandra; Muleri, Fabio; Poutanen, Juri; Podgorný, Jakub; Dovčiak, Michal; Capitanio, Fiamma; Churazov, Eugene; ... Zane, Silvia; + view all <#> Veledina, Alexandra; Muleri, Fabio; Poutanen, Juri; Podgorný, Jakub; Dovčiak, Michal; Capitanio, Fiamma; Churazov, Eugene; De Rosa, Alessandra; Di Marco, Alessandro; Forsblom, Sofia V; Kaaret, Philip; Krawczynski, Henric; La Monaca, Fabio; Loktev, Vladislav; Lutovinov, Alexander A; Molkov, Sergey V; Mushtukov, Alexander A; Ratheesh, Ajay; Rodriguez Cavero, Nicole; Steiner, James F; Sunyaev, Rashid A; Tsygankov, Sergey S; Weisskopf, Martin C; Zdziarski, Andrzej A; Bianchi, Stefano; Bright, Joe S; Bursov, Nikolaj; Costa, Enrico; Egron, Elise; Garcia, Javier A; Green, David A; Gurwell, Mark; Ingram, Adam; Kajava, Jari JE; Kale, Ruta; Kraus, Alex; Malyshev, Denys; Marin, Frédéric; Matt, Giorgio; McCollough, Michael; Mereminskiy, Ilya A; Nizhelsky, Nikolaj; Piano, Giovanni; Pilia, Maura; Pittori, Carlotta; Rao, Ramprasad; Righini, Simona; Soffitta, Paolo; Shevchenko, Anton; Svoboda, Jiri; Tombesi, Francesco; Trushkin, Sergei A; Tsybulev, Peter; Ursini, Francesco; Wu, Kinwah; Agudo, Iván; Antonelli, Lucio A; Bachetti, Matteo; Baldini, Luca; Baumgartner, Wayne H; Bellazzini, Ronaldo; Bongiorno, Stephen D; Bonino, Raffaella; Brez, Alessandro; Bucciantini, Niccolò; Castellano, Simone; Cavazzuti, Elisabetta; Chen, Chien-Ting; Ciprini, Stefano; Del Monte, Ettore; Di Gesu, Laura; Di Lalla, Niccolò; 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; Latronico, Luca; Liodakis, Ioannis; Maldera, Simone; Manfreda, Alberto; Marinucci, Andrea; Marscher, Alan P; Marshall, Herman L; Massaro, Francesco; Mitsuishi, Ikuyuki; Mizuno, Tsunefumi; Negro, Michela; Ng, Chi-Yung; O’Dell, Stephen L; Omodei, Nicola; Oppedisano, Chiara; Papitto, Alessandro; Pavlov, George G; Peirson, Abel L; Perri, Matteo; Pesce-Rollins, Melissa; Petrucci, Pierre-Olivier; Possenti, Andrea; Puccetti, Simonetta; Ramsey, Brian D; Rankin, John; Roberts, Oliver; Romani, Roger W; Sgrò, Carmelo; Slane, Patrick; Spandre, Gloria; Swartz, Doug; Tamagawa, Toru; Tavecchio, Fabrizio; Taverna, Roberto; Tawara, Yuzuru; Tennant, Allyn F; Thomas, Nicholas E; Trois, Alessio; Turolla, Roberto; Vink, Jacco; Xie, Fei; Zane, Silvia; - view fewer <#> (2024) Cygnus X-3 revealed as a Galactic ultraluminous X-ray source by IXPE. Nature Astronomy , 8 pp. 1031-1046. 10.1038/s41550-024-02294-9 <https://doi.org/10.1038/s41550-024-02294-9>. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10196156/1/Zane_CygX-3_IXPE_team.pdf