气候变化领域集成服务门户(CCPortal): Charge exchange - Induced x-ray emission from comet C/1999 S4 (LINEAR)

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DOI	10.1126/science.292.5520.1343
	Charge exchange - Induced x-ray emission from comet C/1999 S4 (LINEAR)
	Lisse C.M.; Christian D.J.; Dennert K.; Meech K.J.; Petre R.; Weaver H.A.; Wolk S.J.
发表日期	2001
ISSN	0036-8075
起始页码	1343
结束页码	1348
卷号	292 期号:5520
英文摘要	Using soft x-ray observations of the bright new comet C/1999 S4 (LINEAR) with the Chandra x-ray observatory, we have detected x-ray line emission created by charge exchange between highly ionized solar wind minor ions and neutral gases in the comet's coma. The emission morphology was symmetrically crescent shaped and extended out to 300,000 kilometers from the nucleus. The emission spectrum contains 6 lines at 320, 400, 490, 560, 600, and 670 electron volts, attributable to electron capture and radiative deexcitation by the solar wind species C+5, C+6, N+7, O+7, and O+8. A contemporaneous 7-day soft x-ray light curve obtained using the Extreme Ultraviolet Explorer demonstrates a large increase in the comet's emission coincident with a strong solar flare on 14 and 15 July 2000.
英文关键词	Emission spectroscopy; Ionization of gases; Morphology; Ultraviolet radiation; X ray analysis; Comet; Neutral gases; Solar system; carbon; nitrogen; oxygen; comet; X-ray; article; astronomy; electricity; gas; priority journal; solar energy; ultraviolet radiation; X ray analysis
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/244550
推荐引用方式 GB/T 7714	Lisse C.M.,Christian D.J.,Dennert K.,et al. Charge exchange - Induced x-ray emission from comet C/1999 S4 (LINEAR)[J],2001,292(5520).
APA	Lisse C.M..,Christian D.J..,Dennert K..,Meech K.J..,Petre R..,...&Wolk S.J..(2001).Charge exchange - Induced x-ray emission from comet C/1999 S4 (LINEAR).Science,292(5520).
MLA	Lisse C.M.,et al."Charge exchange - Induced x-ray emission from comet C/1999 S4 (LINEAR)".Science 292.5520(2001).