Polarization properties of weakly magnetized Neutron Stars in Low Mass X-ray Binaries

X-ray polarimetry missions like IXPE will be able to measure for the first time the polarization properties of accreting, weakly magnetized neutron stars in Low Mass X-ray Binaries. In this work we present simulations of the expected X-ray polarized signal including the coronal emission for differen...

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Veröffentlicht in:arXiv.org 2022-06
Hauptverfasser: Gnarini, Andrea, Ursini, Francesco, Giorgio, Matt, Bianchi, Stefano, Capitanio, Fiamma, Cocchi, Massimo, Farinelli, Ruben, Zhang, Wenda
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Sprache:eng
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Zusammenfassung:X-ray polarimetry missions like IXPE will be able to measure for the first time the polarization properties of accreting, weakly magnetized neutron stars in Low Mass X-ray Binaries. In this work we present simulations of the expected X-ray polarized signal including the coronal emission for different geometries of the corona itself, i.e. a slab above the accretion disc and a spherical shell around the neutron star. The simulations are performed with the fully relativistic Monte Carlo code monk capable of computing the X-ray polarization degree and angle for various physical input parameters of the neutron star, disc and corona. Different coronal geometries result in significantly different X-ray polarization properties, which can therefore be used to constrain the geometry of the systems.
ISSN:2331-8422
DOI:10.48550/arxiv.2206.00749