A micrometeor component of the 1998 Leonid shower

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	A micrometeor component of the 1998 Leonid shower
	Ma, YH; He, YW ; Williams, IP
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2001-08-01
卷号	325 期号:2 页码:457-462
关键词	celestial mechanics comets : individual : 55P/Tempel-Tuttle meteors, meteoroids
ISSN号	0035-8711
英文摘要	Most astronomers expected a significant meteor shower associated with the Leonid meteoroid stream to appear in 1998 and 1999. An enhanced shower was widely observed in both years, and details can be found in many published articles. In 1998, one remarkable feature was the appearance of a strong component, rich in bright meteors, which appeared about 16 h before the expected maximum of the main shower, but another observed feature was an abnormal peak in the ionosphere characteristic value f(b)E(s) which was detected about 18 h after the main shower. A very high value of f(b)E(s) persisted for over an hour. The likely explanation is that the ionosphere was bombarded by an additional swarm of meteoroids, much smaller than those that produce a visible trail or an ionization trail that can be picked up by radio detectors. The different dynamical behaviours between small and large meteoroids are investigated and, in consequence, an explanation for the observed phenomena is offered and 1933 is suggested as being the likely ejection time.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	COMET TEMPEL-TUTTLE ; METEOROID STREAM ; STORMS ; OUTBURST
收录类别	SCI
语种	英语
WOS记录号	WOS:000170568100004
公开日期	2013-01-31
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/8190]
专题	紫金山天文台_近地天体探测和太阳系天体研究团组
作者单位	1.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Acad Sinica, Natl Astron Observ, Beijing, Peoples R China 3.Univ London Queen Mary & Westfield Coll, Astron Unit, London E1 4NS, England 4.Elect Wave Propagat Inst China, Xinxiang 453003, Peoples R China
推荐引用方式 GB/T 7714	Ma, YH,He, YW,Williams, IP. A micrometeor component of the 1998 Leonid shower[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2001,325(2):457-462.
APA	Ma, YH,He, YW,&Williams, IP.(2001).A micrometeor component of the 1998 Leonid shower.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,325(2),457-462.
MLA	Ma, YH,et al."A micrometeor component of the 1998 Leonid shower".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 325.2(2001):457-462.