First Detection of Polarization in X-Rays for PSR B0540-69 and Its Nebula
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Published:2024-02-01
Issue:1
Volume:962
Page:92
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ISSN:0004-637X
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Container-title:The Astrophysical Journal
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language:
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Short-container-title:ApJ
Author:
Xie FeiORCID, Wong JosephineORCID, La Monaca FabioORCID, Romani Roger W.ORCID, Heyl JeremyORCID, Kaaret PhilipORCID, Di Marco AlessandroORCID, Bucciantini NiccolòORCID, Liu KuanORCID, Ng Chi-YungORCID, Di Lalla NiccolòORCID, Weisskopf Martin C.ORCID, Costa EnricoORCID, Soffitta PaoloORCID, Muleri FabioORCID, Bachetti MatteoORCID, Pilia MauraORCID, Rankin JohnORCID, Fabiani SergioORCID, Agudo IvánORCID, Antonelli Lucio A.ORCID, Baldini LucaORCID, Baumgartner Wayne H.ORCID, Bellazzini RonaldoORCID, Bianchi StefanoORCID, Bongiorno Stephen D.ORCID, Bonino RaffaellaORCID, Brez AlessandroORCID, Capitanio FiammaORCID, Castellano SimoneORCID, Cavazzuti ElisabettaORCID, Chen Chien-TingORCID, Ciprini StefanoORCID, De Rosa AlessandraORCID, Del Monte EttoreORCID, Di Gesu LauraORCID, Donnarumma ImmacolataORCID, Doroshenko VictorORCID, Dovčiak MichalORCID, Ehlert Steven R.ORCID, Enoto TeruakiORCID, Evangelista YuriORCID, Ferrazzoli RiccardoORCID, Garcia Javier A.ORCID, Gunji ShuichiORCID, Hayashida Kiyoshi, Iwakiri WataruORCID, Jorstad Svetlana G.ORCID, Karas VladimirORCID, Kislat FabianORCID, Kitaguchi Takao, Kolodziejczak Jeffery J.ORCID, Krawczynski HenricORCID, Latronico LucaORCID, Liodakis IoannisORCID, Maldera SimoneORCID, Manfreda AlbertoORCID, Marin FrédéricORCID, Marinucci AndreaORCID, Marscher Alan P.ORCID, Marshall Herman L.ORCID, Massaro FrancescoORCID, Matt GiorgioORCID, Mitsuishi Ikuyuki, Mizuno TsunefumiORCID, Negro MichelaORCID, 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, Possenti AndreaORCID, Poutanen JuriORCID, Puccetti SimonettaORCID, Ramsey Brian D.ORCID, Ratheesh AjayORCID, Roberts Oliver J.ORCID, Sgrò CarmeloORCID, Slane PatrickORCID, 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, Wu KinwahORCID, Zane SilviaORCID, , Wadiasingh ZorawarORCID, Ho Wynn C. G.ORCID, Harding Alice K.ORCID, Gendreau Keith C.ORCID, Arzoumanian Zaven
Abstract
Abstract
We report on X-ray polarization measurements of the extragalactic Crab-like PSR B0540-69 and its Pulsar Wind Nebula (PWN) in the Large Magellanic Cloud, using a ∼850 ks Imaging X-ray Polarimetry Explorer (IXPE) exposure. The PWN is unresolved by IXPE. No statistically significant polarization is detected for the image-averaged data, giving a 99% confidence polarization upper limit (MDP99) of 5.3% in the 2–8 keV energy range. However, a phase-resolved analysis detects polarization for both the nebula and pulsar in the 4–6 keV energy range. For the PWN defined as the off-pulse phases, the polarization degree (PD) of (24.5 ± 5.3)% and polarization angle (PA) of (78.1 ± 6.2)° is detected at 4.6σ significance level, consistent with the PA observed in the optical band. In a single on-pulse window, a hint of polarization is measured at 3.8σ with PD of (50.0 ± 13.1)% and PA of (6.2 ± 7.4)°. A “simultaneous” PSR/PWN analysis finds two bins at the edges of the pulse exceeding 3σ PD significance, with PD of (68 ± 20)% and (62 ± 20)%; intervening bins at 2–3σ significance have lower PD, hinting at additional polarization structure.
Funder
MOST ∣ National Natural Science Foundation of China National Key R&D Program of China
Publisher
American Astronomical Society
Cited by
1 articles.
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