The 2016 glitch in the Vela pulsar
Xu, Y. H.1,2,3,4; Yuan, J. P.5,6,7; Lee, K. J.8; Hao, L. F.1,3; Wang, N.5; Wang, M.1,3; Yu, M.9; Li, Z. X.1,3,4; Yue, Y. L.9; Liu, Z. Y.5; Yuen, R.5,10; Wen, Z. G.5; Dang, S. J.5; Bai, J. M.1,3; Chen, W.1,3,4; Huang, Y. X.1,3; Yan, W. M.5
Corresponding AuthorYuan, J. P.(
AbstractWe report the detection of a glitch event in the Vela pulsar, which occurred on 12 December 2016, based on the timing data obtained from observations between January 2016 and February 2018 at frequency centered at 2256 MHz using the Kunming 40-m radio telescope. The timing solutions for the pre- and post-glitch are presented. By fitting the glitch model to the timing data, we found that the post-glitch recovery exhibits two terms with exponential decay with the time scales of 1 d and 6 d, respectively. The glitch parameters are determined with g/=1.431(2)x10-6 and g/=73.354x10-3. The value of the coupling parameter is calculated to be approximate to 0.08, implying that the core superfluid is probably not involved in this event. For the glitches with two or more terms with exponential decay in the Vela pulsar, we show that the exponential decays usually exhibit longer time scales with higher degree of glitch recovery. The post-glitch behavior in the slow-down rate is dominated by a linear decrease process. From detection of the variations in the slopes of the spin-down rates after the exponential recoveries of the 2013 and 2016 glitches, we conclude that no persistent shift was involved in the 2016 glitches.
KeywordPulsars: individual (PSR B0833-45, J0835-4510) Stars: neutron Radio: stars
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000455748900002
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Document Type期刊论文
Corresponding AuthorYuan, J. P.
Affiliation1.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China
2.Guizhou Prov Key Lab Radio Astron & Data Proc, Guiyang 550025, Guizhou, Peoples R China
3.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Yunnan, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China
6.Chinese Acad Sci, Ctr Astron Mega Sci, 20A Datun Rd, Beijing 100012, Peoples R China
7.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
8.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
9.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China
10.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Xinjiang, Peoples R China
Recommended Citation
GB/T 7714
Xu, Y. H.,Yuan, J. P.,Lee, K. J.,et al. The 2016 glitch in the Vela pulsar[J]. ASTROPHYSICS AND SPACE SCIENCE,2019,364(1):8.
APA Xu, Y. H..,Yuan, J. P..,Lee, K. J..,Hao, L. F..,Wang, N..,...&Yan, W. M..(2019).The 2016 glitch in the Vela pulsar.ASTROPHYSICS AND SPACE SCIENCE,364(1),8.
MLA Xu, Y. H.,et al."The 2016 glitch in the Vela pulsar".ASTROPHYSICS AND SPACE SCIENCE 364.1(2019):8.
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