First spectropolarimetric observation of the neutron star low-mass X-ray binary GX 3+1

Autor: Gnarini, Andrea, Farinelli, Ruben, Ursini, Francesco, Bianchi, Stefano, Capitanio, Fiamma, Matt, Giorgio, Ng, Mason, Tarana, Antonella, Bobrikova, Anna, Cocchi, Massimo, Fabiani, Sergio, Kaaret, Philip, Poutanen, Juri, Ravi, Swati

We report the first simultaneous X-ray spectropolarimetric observation of the bright atoll neutron star low-mass X-ray binary GX 3+1, performed by the Imaging X-ray Polarimetry Explorer (IXPE) joint with NICER and NuSTAR. The source does not exhibit

Externí odkaz: http://arxiv.org/abs/2411.10353

Polarized radiation coming from the spreading layer of the weakly magnetized neutron stars

Autor: Bobrikova, Anna, Poutanen, Juri, Loktev, Vladislav

Observations show that the X-ray emission of the accreting weakly magnetized neutron stars is polarized. Here, we develop a theoretical model, where we assume the emission of the accreting neutron star coming from the spreading layer, the extension o

Externí odkaz: http://arxiv.org/abs/2409.16023

The IXPE View of Neutron Star Low-Mass X-ray Binaries

Autor: Ursini, Francesco, Gnarini, Andrea, Capitanio, Fiamma, Bobrikova, Anna, Cocchi, Massimo, Di Marco, Alessandro, Fabiani, Sergio, Farinelli, Ruben, La Monaca, Fabio, Rankin, John, Saade, Mary Lynne, Poutanen, Juri

Low-mass X-ray binaries hosting weakly magnetized neutron stars (NS-LMXBs) are among the brightest sources in the X-ray sky. Since 2021, the Imaging X-ray Polarimetry Explorer (IXPE) has provided new measurements of the X-ray polarization of these so

Externí odkaz: http://arxiv.org/abs/2409.07161

Discovery of Polarized X-Ray Emission from the Accreting Millisecond Pulsar SRGA J144459.2-604207

Autor: Papitto, Alessandro, Di Marco, Alessandro, Poutanen, Juri, Salmi, Tuomo, Illiano, Giulia, La Monaca, Fabio, Ambrosino, Filippo, Bobrikova, Anna, Baglio, Maria Cristina, Ballocco, Caterina, Burderi, Luciano, Campana, Sergio, Zelati, Francesco Coti, Di Salvo, Tiziana, La Placa, Riccardo, Loktev, Vladislav, Long, Sinan, Malacaria, Christian, Zanon, Arianna Miraval, Ng, Mason, Pilia, Maura, Sanna, Andrea, Stella, Luigi, Strohmayer, Tod, Zane, Silvia

We report on the discovery of polarized X-ray emission from an accreting millisecond pulsar. During a 10-day-long coverage of the February 2024 outburst of SRGA J144459.2-604207, the Imaging X-ray Polarimetry Explorer (IXPE) detected an average polar

Externí odkaz: http://arxiv.org/abs/2408.00608

Discovery of a strong rotation of the X-ray polarization angle in the galactic burster GX 13+1

Autor: 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

Publikováno v: A&A 688, A170 (2024)

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, h

Externí odkaz: http://arxiv.org/abs/2401.13058