Long-term evolution of the X-ray flux of the Crab pulsar
作者机构：Key Laboratory for Particle AstrophysicsInstitute of High Energy PhysicsChinese Academy of Sciences19B Yuquan RoadBeijing 100049China School of Mathematics and PhysicsAnhui JianZhu UniversityHefei 230601AnhuiChina
出 版 物：《Radiation Detection Technology and Methods》 (辐射探测技术与方法（英文）)
年 卷 期：2023年第7卷第1期
页 面：48-55页
核心收录：
学科分类：082704[工学-辐射防护及环境保护] 08[工学] 0827[工学-核科学与技术]
基 金：support from the National Program on Key Research and Development Project(Grant No.2021YFA0718500)from the Minister of Science and Technology of China(MOST) supports from the National Natural Science Foundation of China under Grants U1938102,12273043,U1838201,U1838202,U1938109 and U1938108 supported by International Partnership Program of Chinese Academy of Sciences(Grant No.113111KYSB20190020)
主 题：X-rays Crab pulsar Flux evolution Spin-down luminosity
摘 要：Purpose In order to carry out in-orbit calibration,the hard X-ray modulation telescope satellite(HXMT)has made a number of observations of Crab *** study the long-term evolution of the X-ray flux of the Crab pulsar with these observational *** We use nearly four years Crab pulsar’s data obtained by HXMT and the neutron star interior composition of explorer to test whether L_(x)∝L_(sd)^(α) holds for an individual pulsar,where L_(x) is the pulsed X-ray luminosity and Lsd is its spin-down *** also combine the earlier results obtained with PCA and HEXTE data(Yan et *** ApJ 865:21,2018)to get the long-term evolution characteristics of the Crab *** We find the X-ray flux evolution can be fitted by a linear correlation:L_(x)∝L_(sd)^(1.42±0.18).In soft X-ray energy band(1–10 keV)and hard X-ray energy band(27–250 keV),αdoes not change significantly with either energy or ***,this will need to be confirmed in *** example,the interpulse component of hard X-ray may follow L_(x)∝L_(sd)^(0.96±0.34),which may be different from the correlation of soft X-rays and main pulse *** the other hand,the hard X-ray flux evolution shows that the performance of high energy X-ray telescope(HE)onboard HXMT,such as effective area,is *** We conclude that the X-ray luminosity of the Crab pulsar closely correlates with its spin-down ***,the emission mechanism responsible for these phenomena remains not fully understood.
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