New timing measurement results of 16 pulsars

doi:10.1093/pasj/psaa058

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	New timing measurement results of 16 pulsars
	Liu, Jie 2,3,7; Yan, Zhen 1,2,3; Shen, Zhi-Qiang 1,2,3,7; Huang, Zhi-Peng 2,3,7; Zhao, Ru-Shuang 6; Wu, Ya-Jun 3; Yuan, Jian-Ping 1,5; Wu, Xin-Ji 4
刊名	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
	2020-08-01
卷号	72 期号:4 页码:70
关键词	pulsars: general stars: neutron techniques: interferometric
ISSN号	0004-6264
DOI	10.1093/pasj/psaa058
产权排序	6
英文摘要	A pulsar's position, proper motion, and parallax are important parameters in timing equations. It is challenging to fit astrometric parameters accurately through pulsar timing, especially for pulsars that show irregular timing properties. With the fast development of related techniques, it is possible to measure astrometric parameters of more and more pulsars in a model-independent manner with very-long-baseline interferometry (VLBI). In this work we select 16 normal pulsars, whose parallax and proper motion have not been successfully fitted with timing observations or show obvious differences from the corresponding latest VLBI solutions, and do further studies on their timing properties. After updating the astrometric parameters in pulsar ephemerides with the latest VLBI measurements, we derive the latest rotation solutions of these pulsars with observation data in the S and C bands obtained from the Shanghai Tian Ma Radio Telescope. Compared with the spin frequency v inferred from previous rotation solutions, the newly fitted v show differences larger than 10(-9) Hz for most pulsars. The contribution of the Shklovsky effect to the period derivative P can be properly removed by taking advantage of the accurate proper motion and distance of target pulsars measured by VLBI astrometry. This further leads to a precise estimate of the intrinsic characteristic age tau(c). The differences between the newly measured tau(c) and corresponding previous results are as large as 2% for some pulsars. VLBI astrometric parameter solutions also lead to better measurements of timing irregularities. For PSR B0154+61, the glitch epoch (MJD 58279.5) measured with a previous ephemeris is about 13d later than the result (MJD 58266.4) obtained with VLBI astrometric parameter solutions.
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资助项目	National Natural Science Foundation of China[U1631122] ; National Natural Science Foundation of China[11633007] ; National Natural Science Foundation of China[11403073] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB23010200] ; National Key R&D Program of China[2018YFA0404602] ; Knowledge Innovation Program of the Chinese Academy of Sciences[KJCX1-YW-18]
WOS关键词	SCINTILLATION VELOCITIES ; PROPER MOTIONS ; ASTROMETRY ; PARALLAXES ; SYSTEM
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000593159200021
资助机构	National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Key R&D Program of China ; Knowledge Innovation Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/3787]
专题	脉冲星研究团组
通讯作者	Yan, Zhen
作者单位	1.Chinese Acad Sci, Key Lab Radio Astron, 10 Yuanhua Rd, Nanjing 210033, Jiangsu, Peoples R China 2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 4.Peking Univ, Sch Phys, Cheng Fu St 209, Beijing, Peoples R China 5.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 6.Guizhou Normal Univ, Sch Phys & Elect Sci, 116 Baoshan Rd N, Guiyang 550001, Guizhou, Peoples R China 7.ShanghaiTech Univ, Sch Phys Sci & Technol, 393 Middle Huaxia Rd, Shanghai 201210, Peoples R China
推荐引用方式 GB/T 7714	Liu, Jie,Yan, Zhen,Shen, Zhi-Qiang,et al. New timing measurement results of 16 pulsars[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2020,72(4):70.
APA	Liu, Jie.,Yan, Zhen.,Shen, Zhi-Qiang.,Huang, Zhi-Peng.,Zhao, Ru-Shuang.,...&Wu, Xin-Ji.(2020).New timing measurement results of 16 pulsars.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,72(4),70.
MLA	Liu, Jie,et al."New timing measurement results of 16 pulsars".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 72.4(2020):70.