Title: | Analysis of Crab X-Ray Polarization Using Deeper Imaging X-Ray Polarimetry Explorer Observations |
Authors: | Wong, Josephine Mizuno, Tsunefumi BUCCIANTINI, Niccolo' Romani, Roger W. Yang, Yi Jung Liu, Kuan Deng, Wei Goya, Kazuho XIE, FEI PILIA, Maura Kaaret, Philip Weisskopf, Martin C. SILVESTRI, STEFANO Ng, C. Y. Chen, Chien Ting Agudo, Iván ANTONELLI, Lucio Angelo BACHETTI, Matteo Baldini, Luca Baumgartner, Wayne H. Bellazzini, Ronaldo Bianchi, Stefano Bongiorno, Stephen D. Bonino, Raffaella Brez, Alessandro CAPITANIO, FIAMMA Castellano, Simone Cavazzuti, Elisabetta Ciprini, Stefano COSTA, ENRICO DE ROSA, Alessandra DEL MONTE, Ettore Di Gesu, Laura Di Lalla, Niccoló DI MARCO, Alessandro Donnarumma, Immacolata Doroshenko, Victor Dovčiak, Michal Ehlert, Steven R. Enoto, Teruaki EVANGELISTA, YURI FABIANI, Sergio FERRAZZOLI, Riccardo Garcia, Javier A. Gunji, Shuichi Heyl, Jeremy Iwakiri, Wataru Jorstad, Svetlana G. Karas, Vladimir Kislat, Fabian Kitaguchi, Takao Kolodziejczak, Jeffery J. Krawczynski, Henric LA MONACA, Fabio Latronico, Luca Liodakis, Ioannis Maldera, Simone Manfreda, Alberto Marin, Frédéric Marinucci, Andrea Marscher, Alan P. Marshall, Herman L. MASSARO, Francesco Matt, Giorgio Mitsuishi, Ikuyuki MULERI, FABIO Negro, Michela O’Dell, Stephen L. Omodei, Nicola Oppedisano, Chiara PAPITTO, ALESSANDRO Pavlov, George G. Peirson, Abel Lawrence PERRI, Matteo Pesce-Rollins, Melissa Petrucci, Pierre Olivier POSSENTI, ANDREA Poutanen, Juri Puccetti, Simonetta Ramsey, Brian D. RANKIN, John RATHEESH, AJAY Roberts, Oliver J. Sgró, Carmelo Slane, Patrick SOFFITTA, PAOLO Spandre, Gloria Swartz, Douglas A. Tamagawa, Toru TAVECCHIO, Fabrizio Taverna, Roberto Tawara, Yuzuru Tennant, Allyn F. Thomas, Nicholas E. TOMBESI, Francesco TROIS, ALESSIO Tsygankov, Sergey Turolla, Roberto Vink, Jacco Wu, Kinwah |
Issue Date: | 2024 |
Journal: | THE ASTROPHYSICAL JOURNAL |
Number: | 973 |
Issue: | 2 |
First Page: | 172 |
Abstract: | We present Crab X-ray polarization measurements using Imaging X-Ray Polarimetry Explorer (IXPE) data with a total exposure of 300 ks, three times more than the initial 2022 discovery paper. Polarization is detected in three times more pulsar phase bins, revealing an S-shaped +40° polarization angle sweep in the main pulse and >1σ departures from the OPTIMA optical polarization in both pulses, suggesting different radiation mechanisms or sites for the polarized emission at the two wavebands. Our polarization map of the inner nebula reveals a toroidal magnetic field, as seen in prior IXPE analyses. Along the southern jet, the magnetic field orientation relative to the jet axis changes from perpendicular to parallel and the polarization degree decreases by ∼6%. These observations may be explained by kink instabilities along the jet or a collision with a dense, jet-deflecting medium at the tip. Using spectropolarimetric analysis, we find asymmetric polarization in the four quadrants of the inner nebula, as expected for a toroidal field geometry, and a spatial correlation between polarization degree and photon index. |
URI: | http://hdl.handle.net/20.500.12386/35669 |
URL: | https://api.elsevier.com/content/abstract/scopus_id/85205447668 https://iopscience.iop.org/article/10.3847/1538-4357/ad6309 |
ISSN: | 0004-637X |
DOI: | 10.3847/1538-4357/ad6309 |
Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista
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