Recent glitches detected in the Crab pulsar

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	Recent glitches detected in the Crab pulsar
	Wang, Jingbo2 ; Wang, Na1,2 ; Tong, Hao3 ; Yuan, Jianping2
刊名	ASTROPHYSICS AND SPACE SCIENCE
	2012-08-01
卷号	340 期号:2 页码:307-315
关键词	Pulsars: general Pulsars: individual: PSR B0531+21 Stars: neutron
ISSN号	0004-640X
通讯作者	na.wang@uao.ac.cn
英文摘要	From 2000 to 2010, monitoring of radio emission from the Crab pulsar at Xinjiang Observatory detected a total of nine glitches. The occurrence of glitches appears to be a random process as described by previous researches. A persistent change in pulse frequency and pulse frequency derivative after each glitch was found. There is no obvious correlation between glitch sizes and the time since last glitch. For these glitches Delta nu (p) and span two orders of magnitude. The pulsar suffered the largest frequency jump ever seen on MJD 53067.1. The size of the glitch is similar to 6.8x10(-6) Hz, similar to 3.5 times that of the glitch occurred in 1989 glitch, with a very large permanent changes in frequency and pulse frequency derivative and followed by a decay with time constant similar to 21 days. The braking index presents significant changes. We attribute this variation to a varying particle wind strength which may be caused by glitch activities. We discuss the properties of detected glitches in Crab pulsar and compare them with glitches in the Vela pulsar.
学科主题	致密天体、高能和基础物理
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	NEUTRON-STARS ; BRAKING INDEX ; VELA PULSAR ; MAGNETIC-FIELD ; ACTIVE PULSAR ; TIMING NOISE ; RADIO ; EVOLUTION ; TELESCOPE ; RECOVERY
收录类别	SCI
资助信息	NSFC (10673021); Knowledge Innovation Program of the Chinese Academy of Sciences(KJCX2-YW-T09); National Basic Research Program of China (973 Program 2009CB824800); West Light Foundation of CAS (No. XBBS201021)
原文出处	http://link.springer.com/journal/10509
语种	英语
WOS记录号	WOS:000305784100009
公开日期	2014-12-12
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/409]
专题	脉冲星研究团组新疆天文台_射电天文研究室新疆天文台_其它
作者单位	1.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China 2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China 3.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jingbo,Wang, Na,Tong, Hao,et al. Recent glitches detected in the Crab pulsar[J]. ASTROPHYSICS AND SPACE SCIENCE,2012,340(2):307-315.
APA	Wang, Jingbo,Wang, Na,Tong, Hao,&Yuan, Jianping.(2012).Recent glitches detected in the Crab pulsar.ASTROPHYSICS AND SPACE SCIENCE,340(2),307-315.
MLA	Wang, Jingbo,et al."Recent glitches detected in the Crab pulsar".ASTROPHYSICS AND SPACE SCIENCE 340.2(2012):307-315.