Discovery of a strong rotation of the X-ray polarization angle in the galactic burster GX 13+1
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2024
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| author | Bobrikova, Anna Forsblom, Sofia V. Di Marco, Alessandro La Monaca, Fabio Poutanen, Juri Ng, Mason Ravi, Swati Loktev, Vladislav Kajava, Jari J. E. Ursini, Francesco Veledina, Alexandra Rogantini, Daniele Salmi, Tuomo Bianchi, Stefano Capitanio, Fiamma Done, Chris Fabiani, Sergio Gnarini, Andrea Heyl, Jeremy Kaaret, Philip Matt, Giorgio Muleri, Fabio Nitindala, Anagha P. Rankin, John Weisskopf, Martin C. Agudo, Ivan Antonelli, Lucio A. Bachetti, Matteo Baldini, Luca Baumgartner, Wayne H. Bellazzini, Ronaldo Bongiorno, Stephen D. Bonino, Raffaella Brez, Alessandro Bucciantini, Niccolo Castellano, Simone Cavazzuti, Elisabetta Chen, Chien-Ting Ciprini, Stefano Costa, Enrico De Rosa, Alessandra Del Monte, Ettore Di Gesu, Laura Di Lalla, Niccolo Donnarumma, Immacolata Doroshenko, Victor Dovciak, Michal Ehlert, Steven R. Enoto, Teruaki Evangelista, Yuri Ferrazzoli, Riccardo Garcia, Javier A. Gunji, Shuichi Hayashida, Kiyoshi Iwakiri, Wataru Jorstad, Svetlana G. Karas, Vladimir Kislat, Fabian Kitaguchi, Takao Kolodziejczak, Jeffery J. Krawczynski, Henric Latronico, Luca Liodakis, Ioannis Maldera, Simone Manfreda, Alberto Marin, Frederic Marinucci, Andrea Marscher, Alan P. Marshall, Herman L. Massaro, Francesco Mitsuishi, Ikuyuki Mizuno, Tsunefumi Negro, Michela Ng, Chi-Yung O'Dell, Stephen L. Omodei, Nicola Oppedisano, Chiara Papitto, Alessandro Pavlov, George G. Peirson, Abel L. Perri, Matteo Pesce-Rollins, Melissa Petrucci, Pierre-Olivier Pilia, Maura Possenti, Andrea Puccetti, Simonetta Ramsey, Brian D. Ratheesh, Ajay J. Roberts, Oliver Romani, Roger W. Sgro, 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 S. Turolla, Roberto Vink, Jacco Wu, Kinwah Xie, Fei Zane, Silvia |
| author_facet | Bobrikova, Anna Forsblom, Sofia V. Di Marco, Alessandro La Monaca, Fabio Poutanen, Juri Ng, Mason Ravi, Swati Loktev, Vladislav Kajava, Jari J. E. Ursini, Francesco Veledina, Alexandra Rogantini, Daniele Salmi, Tuomo Bianchi, Stefano Capitanio, Fiamma Done, Chris Fabiani, Sergio Gnarini, Andrea Heyl, Jeremy Kaaret, Philip Matt, Giorgio Muleri, Fabio Nitindala, Anagha P. Rankin, John Weisskopf, Martin C. Agudo, Ivan Antonelli, Lucio A. Bachetti, Matteo Baldini, Luca Baumgartner, Wayne H. Bellazzini, Ronaldo Bongiorno, Stephen D. Bonino, Raffaella Brez, Alessandro Bucciantini, Niccolo Castellano, Simone Cavazzuti, Elisabetta Chen, Chien-Ting Ciprini, Stefano Costa, Enrico De Rosa, Alessandra Del Monte, Ettore Di Gesu, Laura Di Lalla, Niccolo Donnarumma, Immacolata Doroshenko, Victor Dovciak, Michal Ehlert, Steven R. Enoto, Teruaki Evangelista, Yuri Ferrazzoli, Riccardo Garcia, Javier A. Gunji, Shuichi Hayashida, Kiyoshi Iwakiri, Wataru Jorstad, Svetlana G. Karas, Vladimir Kislat, Fabian Kitaguchi, Takao Kolodziejczak, Jeffery J. Krawczynski, Henric Latronico, Luca Liodakis, Ioannis Maldera, Simone Manfreda, Alberto Marin, Frederic Marinucci, Andrea Marscher, Alan P. Marshall, Herman L. Massaro, Francesco Mitsuishi, Ikuyuki Mizuno, Tsunefumi Negro, Michela Ng, Chi-Yung O'Dell, Stephen L. Omodei, Nicola Oppedisano, Chiara Papitto, Alessandro Pavlov, George G. Peirson, Abel L. Perri, Matteo Pesce-Rollins, Melissa Petrucci, Pierre-Olivier Pilia, Maura Possenti, Andrea Puccetti, Simonetta Ramsey, Brian D. Ratheesh, Ajay J. Roberts, Oliver Romani, Roger W. Sgro, 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 S. Turolla, Roberto Vink, Jacco Wu, Kinwah Xie, Fei Zane, Silvia |
| contents | Weakly magnetized neutron stars in X-ray binaries show complex phenomenology with several spectral components that can be associated with the accretion disk, boundary and/or spreading layer, a corona, and a wind. Spectroscopic information alone is, however, not enough to disentangle these components. Additional information about the nature of the spectral components and in particular the geometry of the emission region can be provided by X-ray polarimetry. One of the objects of the class, a bright, persistent, and rather peculiar galactic Type I X-ray burster was observed with the Imaging X-ray Polarimetry Explorer (IXPE) and the X-ray Multi-Mirror Mission Newton (XMM-Newton). Using the XMM-Newton data we estimated the current state of the source as well as detected strong absorption lines associated with the accretion disk wind. IXPE data showed the source to be significantly polarized in the 2-8 keV energy band with the overall polarization degree (PD) of 1.4% at a polarization angle (PA) of -2 degrees (errors at 68% confidence level). During the two-day long observation, we detected rotation of the PA by about 70 degrees with the corresponding changes in the PD from 2% to non-detectable and then up to 5%. These variations in polarization properties are not accompanied by visible changes in spectroscopic characteristics. The energy-resolved polarimetric analysis showed a significant change in polarization, from being strongly dependent on energy at the beginning of the observation to being almost constant with energy in the later parts of the observation. As a possible interpretation, we suggest the presence of a constant component of polarization, strong wind scattering, or different polarization of the two main spectral components with individually peculiar behavior. The rotation of the PA suggests a 30-degree misalignment of the neutron star spin from the orbital axis. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_13058 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Discovery of a strong rotation of the X-ray polarization angle in the galactic burster GX 13+1 Bobrikova, Anna Forsblom, Sofia V. Di Marco, Alessandro La Monaca, Fabio Poutanen, Juri Ng, Mason Ravi, Swati Loktev, Vladislav Kajava, Jari J. E. Ursini, Francesco Veledina, Alexandra Rogantini, Daniele Salmi, Tuomo Bianchi, Stefano Capitanio, Fiamma Done, Chris Fabiani, Sergio Gnarini, Andrea Heyl, Jeremy Kaaret, Philip Matt, Giorgio Muleri, Fabio Nitindala, Anagha P. Rankin, John Weisskopf, Martin C. Agudo, Ivan Antonelli, Lucio A. Bachetti, Matteo Baldini, Luca Baumgartner, Wayne H. Bellazzini, Ronaldo Bongiorno, Stephen D. Bonino, Raffaella Brez, Alessandro Bucciantini, Niccolo Castellano, Simone Cavazzuti, Elisabetta Chen, Chien-Ting Ciprini, Stefano Costa, Enrico De Rosa, Alessandra Del Monte, Ettore Di Gesu, Laura Di Lalla, Niccolo Donnarumma, Immacolata Doroshenko, Victor Dovciak, Michal Ehlert, Steven R. Enoto, Teruaki Evangelista, Yuri Ferrazzoli, Riccardo Garcia, Javier A. Gunji, Shuichi Hayashida, Kiyoshi Iwakiri, Wataru Jorstad, Svetlana G. Karas, Vladimir Kislat, Fabian Kitaguchi, Takao Kolodziejczak, Jeffery J. Krawczynski, Henric Latronico, Luca Liodakis, Ioannis Maldera, Simone Manfreda, Alberto Marin, Frederic Marinucci, Andrea Marscher, Alan P. Marshall, Herman L. Massaro, Francesco Mitsuishi, Ikuyuki Mizuno, Tsunefumi Negro, Michela Ng, Chi-Yung O'Dell, Stephen L. Omodei, Nicola Oppedisano, Chiara Papitto, Alessandro Pavlov, George G. Peirson, Abel L. Perri, Matteo Pesce-Rollins, Melissa Petrucci, Pierre-Olivier Pilia, Maura Possenti, Andrea Puccetti, Simonetta Ramsey, Brian D. Ratheesh, Ajay J. Roberts, Oliver Romani, Roger W. Sgro, 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 S. Turolla, Roberto Vink, Jacco Wu, Kinwah Xie, Fei Zane, Silvia High Energy Astrophysical Phenomena Weakly magnetized neutron stars in X-ray binaries show complex phenomenology with several spectral components that can be associated with the accretion disk, boundary and/or spreading layer, a corona, and a wind. Spectroscopic information alone is, however, not enough to disentangle these components. Additional information about the nature of the spectral components and in particular the geometry of the emission region can be provided by X-ray polarimetry. One of the objects of the class, a bright, persistent, and rather peculiar galactic Type I X-ray burster was observed with the Imaging X-ray Polarimetry Explorer (IXPE) and the X-ray Multi-Mirror Mission Newton (XMM-Newton). Using the XMM-Newton data we estimated the current state of the source as well as detected strong absorption lines associated with the accretion disk wind. IXPE data showed the source to be significantly polarized in the 2-8 keV energy band with the overall polarization degree (PD) of 1.4% at a polarization angle (PA) of -2 degrees (errors at 68% confidence level). During the two-day long observation, we detected rotation of the PA by about 70 degrees with the corresponding changes in the PD from 2% to non-detectable and then up to 5%. These variations in polarization properties are not accompanied by visible changes in spectroscopic characteristics. The energy-resolved polarimetric analysis showed a significant change in polarization, from being strongly dependent on energy at the beginning of the observation to being almost constant with energy in the later parts of the observation. As a possible interpretation, we suggest the presence of a constant component of polarization, strong wind scattering, or different polarization of the two main spectral components with individually peculiar behavior. The rotation of the PA suggests a 30-degree misalignment of the neutron star spin from the orbital axis. |
| title | Discovery of a strong rotation of the X-ray polarization angle in the galactic burster GX 13+1 |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2401.13058 |