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题名: Recent glitches detected in the Crab pulsar
作者: Wang, Jingbo2; Wang, Na1, 2; Tong, Hao3; Yuan, Jianping2
刊名: ASTROPHYSICS AND SPACE SCIENCE
出版日期: 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
DOI: 10.1007/s10509-012-1058-x
文章类型: Article
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.
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
语种: 英语
WOS记录号: WOS:000305784100009
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/15608
Appears in Collections:分子云与恒星形成研究团组_期刊论文

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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
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