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Superstrong magnetic fields of neutron stars in Be X-ray binaries

Published online by Cambridge University Press:  30 December 2019

ChangSheng Shi Open the ORCID record for ChangSheng Shi [Opens in a new window] ,
ShuangNan Zhang  and
XiangDong Li
ChangSheng Shi
Affiliation:
College of Material Science and Chemical Engineering, Hainan University, Hainan 570228, China email: shics@hainu.edu.cn Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210046, China
ShuangNan Zhang
Affiliation:
Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China Physics Department, University of Alabama in Huntsville, Huntsville, AL 35899, USA
XiangDong Li
Affiliation:
Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210046, China Department of Astronomy, Nanjing University, Nanjing 210046, China
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Abstract

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A few Be X-ray binaries might constitute a group of special sources because the neutron stars in them may have superstrong magnetic fields. Generally, the neutron stars have long spin periods and some emission lines are shown from the B type star, which is attributed to an equatorial disc. We re-build new dimensionless torque models and obtain the superstrong magnetic fields of the neutron stars in the Be X-ray binaries in Large Magellanic Cloud, Small Magellanic Cloud and Milky Way when the compressed magnetosphere is considered. Although our conclusions are obtained when the disk accretion mode is considered, the results may be applied the Be X-ray binaries with wind accretion mode. SXP1323 and 4U 2206+54, in which the magnetic fields of the NSs may be close to the maximum ‘virial’ value, are the best objects to explore superstrong magnetic field.

Keywords

accretionaccretion disksstars: neutronX-rays: binaries.
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S346: High-mass X-ray Binaries: Illuminating the Passage from Massive Binaries to Merging Compact Objects , August 2018 , pp. 135 - 138
Copyright
© International Astronomical Union 2019 

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