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Polarization properties of weakly magnetized neutron stars in low-mass X-ray binaries

Journal
Date Issued
2022
Author(s)
Gnarini, A
•
•
Matt, G
•
Bianchi, S
•
•
•
•
Zhang, W
DOI
Abstract
X-ray polarimetry missions like Imaging X-ray Polarimetry Explorer 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.
Volume
514
Issue
2
Start page
2561
Uri
Url
Issn Identifier
0035-8711
Ads BibCode
2022MNRAS.514.2561G
Rights
open.access
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