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	Phase evolution of the crab pulsar between radio and x-ray
	Yan,L. L.1,2,3; Ge,M. Y.1; Yuan,J. P.4; Zheng,S. J.1; Lu,F. J.1; Tuo,Y. L.1,2; Tong,H.4; Zhang,S. N.1; Lu,Y.1; Han,J. L.5
刊名	The astrophysical journal
	2017-08-18
卷号	845期号:2
关键词	Stars: neutron Pulsars: individual (psr b0531+21) X-rays: stars
ISSN号	0004-637X
DOI	10.3847/1538-4357/aa7ff6
英文摘要	Abstract we study the x-ray phases of the crab pulsar utilizing the 11-year observations from the rossi x-ray timing explorer, 6-year radio observations from nanshan telescope, and the ephemeris from jodrell bank observatory. it is found that the x-ray phases in different energy bands and the radio phases from the nanshan telescope show similar behaviors, including long-time evolution and short-time variations. such strong correlations between the x-ray and radio phases imply that the radio and x-ray timing noises are both generated from the pulsar spin that cannot be well described by the the monthly ephemeris from the jodrell bank observatory. when using the nanshan phases as references to study the x-ray timing noise, it has a significantly smaller variation amplitude and shows no long-time evolution, with a change rate of (?1.1 ± 1.1)?×?10?7 periods per day. these results show that the distance of the x-ray and radio emission regions on the crab pulsar has no detectable secular change, and it is unlikely that the timing noises resulted from any unique physical processes in the radio or x-ray emitting regions. the similar behaviors of the x-ray and radio timing noises also imply that the variation of the interstellar medium is not the origin of the crab pulsar’s timing noises, which is consistent with the results obtained from the multi-frequency radio observations of psr b1540?06.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-845-2-AA7FF6
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2175712
专题	高能物理研究所
作者单位	1.Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China; yanlinli@ihep.ac.cn 2.University of Chinese Academy of Sciences, Beijing 100049, China 3.Qian Xuesen Laboratory of Space Technology, No. 104, Youyi Road, Haidian District, Beijing 100094, China 4.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China 5.National Astronomical Observatory, Chinese Academy of Sciences, Jia 20 Datun Road, Beijing 100012, China
推荐引用方式 GB/T 7714	Yan,L. L.,Ge,M. Y.,Yuan,J. P.,et al. Phase evolution of the crab pulsar between radio and x-ray[J]. The astrophysical journal,2017,845(2).
APA	Yan,L. L..,Ge,M. Y..,Yuan,J. P..,Zheng,S. J..,Lu,F. J..,...&Du,Y. J..(2017).Phase evolution of the crab pulsar between radio and x-ray.The astrophysical journal,845(2).
MLA	Yan,L. L.,et al."Phase evolution of the crab pulsar between radio and x-ray".The astrophysical journal 845.2(2017).

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