Rapid time variations of water maser emission in W3(OH) and NGC 6334C

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	Rapid time variations of water maser emission in W3(OH) and NGC 6334C
	Xu, Y; Zheng, XW ; Zhang, FJ ; Yu, ZY ; Han, P ; Scalise, E ; Chen, YJ
刊名	ASTRONOMY & ASTROPHYSICS
	2000-12-01
卷号	364 期号:1 页码:232-236
关键词	masers stars : formation ISM : individual objects : NGC 6334F ISM : individual objects : W3(OH)
ISSN号	0004-6361
英文摘要	We report the observed results of a short time scale monitoring of the 22 GHz water maser emission in W3(OH) and NGC 6334C. Both sources were monitored daily for about a month. The aim of the observations is to investigate the possible presence of very short interval variations on time scales of hours or days. Our observations showed that the flux density of the component at -52.8 km s(-1) in W3(OH) decayed linearly with a timescale of about 19 days, and a maser in NGC 6334C flared rapidly, doubling the flux with a timescale of about 4 days. The rapid time variability of the observed water maser features may be caused by an external pumping event. The collision among dense clumps at sufficient relative velocities supplies the powerful energy required to excite H2O maser emission and then quenches the pump in the following days or longer period.
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]	H-II REGIONS ; H2O SOURCES ; VAPOR ; NGC-6334 ; STARS ; DISCOVERY
收录类别	SCI
语种	英语
WOS记录号	WOS:000166412300031
公开日期	2013-02-01
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/8286]
专题	紫金山天文台_紫金山天文台青海观测站
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Chinese Acad Sci, Chinese Natl Observ, Beijing 100080, Peoples R China 3.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China 4.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Xu, Y,Zheng, XW,Zhang, FJ,et al. Rapid time variations of water maser emission in W3(OH) and NGC 6334C[J]. ASTRONOMY & ASTROPHYSICS,2000,364(1):232-236.
APA	Xu, Y.,Zheng, XW.,Zhang, FJ.,Yu, ZY.,Han, P.,...&Chen, YJ.(2000).Rapid time variations of water maser emission in W3(OH) and NGC 6334C.ASTRONOMY & ASTROPHYSICS,364(1),232-236.
MLA	Xu, Y,et al."Rapid time variations of water maser emission in W3(OH) and NGC 6334C".ASTRONOMY & ASTROPHYSICS 364.1(2000):232-236.