X-Ray Polarization of the Eastern Lobe of SS 433
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Published:2024-01-01
Issue:1
Volume:961
Page:L12
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ISSN:2041-8205
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Container-title:The Astrophysical Journal Letters
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language:
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Short-container-title:ApJL
Author:
Kaaret PhilipORCID, Ferrazzoli RiccardoORCID, Silvestri StefanoORCID, Negro MichelaORCID, Manfreda AlbertoORCID, Wu KinwahORCID, Costa EnricoORCID, Soffitta PaoloORCID, Safi-Harb SamarORCID, Poutanen JuriORCID, Veledina AlexandraORCID, Di Marco AlessandroORCID, Slane PatrickORCID, Bianchi StefanoORCID, Ingram AdamORCID, Romani Roger W.ORCID, Cibrario NicolòORCID, Mac Intyre Brydyn, Mikus̆incová RomanaORCID, Ratheesh AjayORCID, Steiner James F.ORCID, Svoboda JiriORCID, Tugliani StefanoORCID, Agudo IvánORCID, Antonelli Lucio A.ORCID, Bachetti MatteoORCID, Baldini LucaORCID, Baumgartner Wayne H.ORCID, Bellazzini RonaldoORCID, Bongiorno Stephen D.ORCID, Bonino RaffaellaORCID, Brez AlessandroORCID, Bucciantini NiccolòORCID, Capitanio FiammaORCID, Castellano SimoneORCID, Cavazzuti ElisabettaORCID, Chen Chien-TingORCID, Ciprini StefanoORCID, De Rosa AlessandraORCID, Del Monte EttoreORCID, Di Gesu LauraORCID, Di Lalla NiccolòORCID, Donnarumma ImmacolataORCID, Doroshenko VictorORCID, Dovčiak MichalORCID, Ehlert Steven R.ORCID, Enoto TeruakiORCID, Evangelista YuriORCID, Fabiani SergioORCID, García Javier A.ORCID, Gunji ShuichiORCID, Hayashida Kiyoshi, Heyl JeremyORCID, Iwakiri WataruORCID, Jorstad Svetlana G.ORCID, Karas VladimirORCID, Kislat FabianORCID, Kitaguchi Takao, Kolodziejczak Jeffery J.ORCID, Krawczynski HenricORCID, La Monaca FabioORCID, Latronico LucaORCID, Liodakis IoannisORCID, Maldera SimoneORCID, Marin FrédéricORCID, Marinucci AndreaORCID, Marscher Alan P.ORCID, Marshall Herman L.ORCID, Massaro FrancescoORCID, Matt GiorgioORCID, Mitsuishi Ikuyuki, Mizuno TsunefumiORCID, Muleri FabioORCID, Ng Chi-YungORCID, O’Dell Stephen L.ORCID, Omodei NicolaORCID, Oppedisano ChiaraORCID, Papitto AlessandroORCID, Pavlov George G.ORCID, Peirson Abel L.ORCID, Perri MatteoORCID, Pesce-Rollins MelissaORCID, Petrucci Pierre-OlivierORCID, Pilia MauraORCID, Possenti AndreaORCID, Puccetti SimonettaORCID, Ramsey Brian D.ORCID, Rankin JohnORCID, Roberts Oliver J.ORCID, Sgrò CarmeloORCID, Spandre GloriaORCID, Swartz Douglas A.ORCID, Tamagawa ToruORCID, Tavecchio FabrizioORCID, Taverna RobertoORCID, Tawara Yuzuru, Tennant Allyn F.ORCID, Thomas Nicholas E.ORCID, Tombesi FrancescoORCID, Trois AlessioORCID, Tsygankov Sergey S.ORCID, Turolla RobertoORCID, Vink JaccoORCID, Weisskopf Martin C.ORCID, Xie FeiORCID, Zane SilviaORCID
Abstract
Abstract
How astrophysical systems translate the kinetic energy of bulk motion into the acceleration of particles to very high energies is a pressing question. SS 433 is a microquasar that emits TeV γ-rays indicating the presence of high-energy particles. A region of hard X-ray emission in the eastern lobe of SS 433 was recently identified as an acceleration site. We observed this region with the Imaging X-ray Polarimetry Explorer and measured a polarization degree in the range 38%–77%. The high polarization degree indicates the magnetic field has a well-ordered component if the X-rays are due to synchrotron emission. The polarization angle is in the range −12° to +10° (east of north), which indicates that the magnetic field is parallel to the jet. Magnetic fields parallel to the bulk flow have also been found in supernova remnants and the jets of powerful radio galaxies. This may be caused by interaction of the flow with the ambient medium.
Funder
NASA Agenzia Spaziale Italiana Academy of Finland
Publisher
American Astronomical Society
Subject
Space and Planetary Science,Astronomy and Astrophysics
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