| Title: |
First Detection of Polarization in X-Rays for PSR B0540-69 and Its Nebula |
| Authors: |
Xie, F; Wong, J; La Monaca, F; Romani, RW; Heyl, J; Kaaret, P; Di Marco, A; Bucciantini, N; Liu, K; Ng, CY; Di Lalla, N; Weisskopf, MC; Costa, E; Soffitta, P; Muleri, F; Bachetti, M; Pilia, M; Rankin, J; Fabiani, S; Agudo, I; Antonelli, LA; Baldini, L; Baumgartner, WH; Bellazzini, R; Bianchi, S; Bongiorno, SD; Bonino, R; Brez, A; Capitanio, F; Castellano, S; Cavazzuti, E; Chen, CT; Ciprini, S; de Rosa, A; Del Monte, E; Di Gesu, L; Donnarumma, I; Doroshenko, V; Dovciak, M; Ehlert, SR; Enoto, T; Evangelista, Y; Ferrazzoli, R; Garcia, JA; Gunji, S; Hayashida, K; Iwakiri, W; Jorstad, SG; Karas, V; Kislat, F; Kitaguchi, T; Kolodziejczak, JJ; Krawczynski, H; Latronico, L; Liodakis, I; Maldera, S; Manfreda, A; Marin, F; Marinucci, A; Marscher, AP; Marshall, HL; Massaro, F; Matt, G; Mitsuishi, I; Mizuno, T; Negro, M; O'Dell, SL; Omodei, N; Oppedisano, C; Papitto, A; Pavlov, GG; Peirson, AL; Perri, M; Pesce-Rollins, M; Petrucci, PO; Possenti, A; Poutanen, J; Puccetti, S; Ramsey, BD; Ratheesh, A; Roberts, OJ; Sgro, C; Slane, P; Spandre, G; Swartz, DA; Tamagawa, T; Tavecchio, F; Taverna, R; Tawara, Y; Tennant, AF; Thomas, NE; Tombesi, F; Trois, A; Tsygankov, SS; Turolla, R; Vink, J; Wu, KW; Zane, S; Wadiasingh, Z; Ho, WCG; Harding, AK; Gendreau, KC; Arzoumanian, Z |
| Publisher Information: |
American Astronomical Society; BRISTOL |
| Publication Year: |
2024 |
| Collection: |
University of Hong Kong: HKU Scholars Hub |
| Description: |
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 similar to 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)degrees is detected at 4.6 sigma significance level, consistent with the PA observed in the optical band. In a single on-pulse window, a hint of polarization is measured at 3.8 sigma with PD of (50.0 +/- 13.1)% and PA of (6.2 +/- 7.4)degrees. A "simultaneous" PSR/PWN analysis finds two bins at the edges of the pulse exceeding 3 sigma PD significance, with PD of (68 +/- 20)% and (62 +/- 20)%; intervening bins at 2-3 sigma significance have lower PD, hinting at additional polarization structure. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
Astrophysical Journal; WOS:001159833100001; https://hub.hku.hk/handle/10722/342096; 962 |
| DOI: |
10.3847/1538-4357/ad17ba |
| Availability: |
https://hub.hku.hk/handle/10722/342096; https://doi.org/10.3847/1538-4357/ad17ba |
| Rights: |
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. |
| Accession Number: |
edsbas.6F5ECFF2 |
| Database: |
BASE |