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Simultaneous space and phase resolved X-ray polarimetry of the Crab pulsar and nebula
Tekijät: Bucciantini Niccolò, Ferrazzoli Riccardo, Bachetti Matteo, Rankin John, Di Lalla Niccolò, Sgrò Carmelo, Omodei Nicola, Kitaguchi Takao, Mizuno Tsunefumi, Gunji Shuichi, Watanabe Eri, Baldini Luca, Slane Patrick, Weisskopf Martin C., Romani Roger W., Possenti Andrea, Marshall Herman L., Silvestri Stefano, Pacciani Luigi, Negro Michela, Muleri Fabio, Wilhelmi Emma de Oña, Xie Fei, Heyl Jeremy, Pesce-Rollins Melissa, Wong Josephine, Pilia Maura, Agudo Iván, Antonelli Lucio A., Baumgartner Wayne H., Bellazzini Ronaldo, Bianchi Stefano, Bongiorno Stephen D., Bonino Raffaella, Brez Alessandro, Capitanio Fiamma, Castellano Simone, Cavazzuti Elisabetta, Chen Chien-Ting, Ciprini Stefamp, Costa Enrico, De Rosa Alessandra, Del Monte Ettore, Di Gesu Laura, Di Marco Alessandro, Donnarumma Immacolata, Doroshenko Victor, Dovčiak Michal, Ehlert Steven R., Enoto Teruaki, Evangelista Yuri, Fabiani Sergio, Garcia Javier A., Hayashida Kiyoshi, Iwakiri Wataru, Jorstad Svetlana G., Kaaret Philip, Karas Vladimir, Kislat Fabian, Kolodziejczak Jeffery J., Krawczynski Henric, La Monaca Fabio, Latronico Luca, Liodakis Ioannis, Maldera Simone, Manfreda Alberto, Marin Frédéric, Marinucci Andrea, Marscher Alan P., Massaro Francesco, Matt Giorgio, Mitsuishi Ikuyuki, Ng C.-Y., O'Dell Stephen L., Oppedisano Chiara, Papitto Alessandro, Pavlov George G., Peirson Abel L., Perri Matteo, Petrucci Pierre-Olivier, Poutanen Juri, Puccetti Simonetta, Ramsey Brian D., Ratheesh Ajay, Roberts Oliver J., Soffitta Paolo, Spandre Gloria, Swartz Doug, Tamagawa Tomu, Tavecchio Fabrizio, Taverna Roberto, Tawara Yuzuru, Tennant Allyn F., Thomas Nicholas E., Tombesi Francesco, Trois Alessio, Tsygankov Sergey, Turolla Roberto, Vink Jacco, Wu Kinwah, Zane Silvia
Kustantaja: NATURE PORTFOLIO
Julkaisuvuosi: 2023
Journal: Nature Astronomy
Lehden akronyymi: NAT ASTRON
Vuosikerta: 7
Aloitussivu: 602
Lopetussivu: 610
Sivujen määrä: 9
ISSN: 2397-3366
eISSN: 2397-3366
DOI: https://doi.org/10.1038/s41550-023-01936-8
Verkko-osoite: https://www.nature.com/articles/s41550-023-01936-8
Preprintin osoite: https://doi.org/10.21203/rs.3.rs-1909091/v1
X-ray polarization measurements of the Crab nebula and pulsar by the IXPE satellite reveal a global toroidal magnetic field with large variations in local polarization, suggesting a more complex turbulence distribution than anticipated.The Crab pulsar and its nebula are among the most studied astrophysical systems, and constitute one of the most promising environments where high-energy processes and particle acceleration can be investigated. They are the only objects for which significant X-ray polarization was detected in the past. Here we present the Imaging X-ray Polarimetry Explorer (IXPE) observation of the Crab pulsar and nebula. The total pulsar pulsed emission in the [2-8] keV energy range is unpolarized. Significant polarization up to 15% is detected in the core of the main peak. The nebula has a total space integrated polarized degree of 20% and polarization angle of 145 degrees. The polarized maps show a large variation in the local polarization, and regions with a polarized degree up to 45-50%. The polarization pattern suggests a predominantly toroidal magnetic field. Our findings for the pulsar are inconsistent with most inner magnetospheric models, and suggest emission is more likely to come from the wind region. For the nebula, the polarization map suggests a patchy distribution of turbulence, uncorrelated with the intensity, in contrast with simple expectations from numerical models.
