文章基本信息

标题：Properties of the transient X-ray pulsar Swift J1816.7–1613 and its optical companion
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作者：Armin Nabizadeh ; Sergey S. Tsygankov ; Dmitrij I. Karasev 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2019
卷号：622
DOI：10.1051/0004-6361/201834635
语种：English
出版社：EDP Sciences
摘要：We present results of investigation of the poorly studied X-ray pulsarSwift J1816.7–1613during its transition from the type I outburst to the quiescent state. Our studies are based on the data obtained from X-ray observatoriesSwift,NuSTAR, andChandraalongside with the latest IR data from UKIDSS/GPS andSpitzer/GLIMPSE surveys. The aim of the work is to determine the parameters of the system, namely the strength of the neutron star magnetic field and the distance to the source, which are required for the interpretation of the source behaviour in the framework of physically motivated models. No cyclotron absorption line was detected in the broad-band energy spectrum. However, the timing analysis hints at the typical for the X-ray pulsars magnetic field from a few ×1011to a few ×1012G. We also estimated the type of the IR-companion as a B0-2e star located at a distance of 7–13 kpc.
关键词：enaccretion, accretion disksmagnetic fieldspulsars: individual: Swift J1816.7–1613X-rays: binariesstars: neutron