A2 Refereed review article in a scientific journal
The IXPE View of Neutron Star Low-Mass X-ray Binaries
Authors: 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
Publisher: MDPI
Publishing place: BASEL
Publication year: 2024
Journal: Galaxies
Journal name in source: GALAXIES
Journal acronym: GALAXIES
Article number: 43
Volume: 12
Issue: 4
Number of pages: 8
eISSN: 2075-4434
DOI: https://doi.org/10.3390/galaxies12040043
Web address : https://doi.org/10.3390/galaxies12040043
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/457824824
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 sources. IXPE observations have revealed that most NS-LMXBs are significantly polarized in the X-rays, providing unprecedented insight into the geometry of their accretion flow. In this review paper, we summarize the first results obtained by IXPE on NS-LMXBs, the emerging trends within each class of sources (atoll/Z), and possible physical interpretations.
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Funding information in the publication:
F.U., A.G., F.C., A.D.M., and F.L.M. acknowledge financial support by the Italian Space Agency (Agenzia Spaziale Italiana, ASI) through contract ASI-INAF-2022-19-HH.0. F.C. acknowledges support by the Istituto Nazionale di Astrofisica (INAF) grant 1.05.23.05.06: “Spin and Geometry in accreting X-ray binaries: The first multi frequency spectro-polarimetric campaign”. A.B. was supported by the Finnish Cultural Foundation grant 00240328. A.B. and J.P. thank the Academy of Finland grant 333112 for support. A.D.M., S.F., and F.L.M. aknowledge partial financial support by MAECI with grant CN24GR08 “GRBAXP: Guangxi-Rome Bilateral Agreement for X-ray Polarimetry in Astrophysics”.
