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

被引：17

作者：

Gnarini, A. ^{[1
]}

Ursini, F. ^{[1
]}

Matt, G. ^{[1
]}

Bianchi, S. ^{[1
]}

Capitanio, F. ^{[2
]}

Cocchi, M. ^{[2
]}

Farinelli, R. ^{[3
]}

Zhang, W. ^{[4
]}

机构：

[1] Univ Roma Tre, Dipartimento Matemat & Fis, Via Vasca Navale 84, I-00146 Rome, Italy

[2] IAPS, INAF, Via Fosso Cavaliere 100, I-00113 Rome, Italy

[3] INAF Osservatorio Astrofis & Sci Spazio Bologna, Via P Gobetti 101, I-40129 Bologna, Italy

[4] Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100101, Peoples R China

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2022年 / 514卷 / 02期

关键词：

accretion; accretion discs; polarization; stars: neutron; X-rays: binaries; QUASI-PERIODIC OSCILLATIONS; ACCRETION STATES; BOUNDARY-LAYER; EMISSION; MODEL; SPECTRUM; BEHAVIOR; DISKS;

D O I：

10.1093/mnras/stac1523

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：2561 / 2567

页数：7

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