Internal Motion of 6.7-GHz Methanol Masers in H II Region S269

	Internal Motion of 6.7-GHz Methanol Masers in H II Region S269
	Sawada-Satoh, Satoko 1; Fujisawa, Kenta 2; Sugiyama, Koichiro 2; Wajima, Kiyoaki 2,3; Honma, Mareki 4,5
刊名	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
	2013-08-25
卷号	65 期号:4 页码:1
关键词	ISM: H II regions ISM: individual (S269) masers: methanol stars: formation
英文摘要	We present the first internal motion measurement of the 6.7-GHz methanol maser within S269, a small H II region in the outer Galaxy, which was carried out in 2006 and 2011 using the Japanese VLBI Network (JVN). Several maser groups and weak isolated spots were detected in an area spanning similar to 200 mas (1000 AU). Three remarkable maser groups are aligned at a position angle of 80 degrees. Two of three maser groups were also detected by a previous observation in 1998, which allowed us to study a long-term position variation of maser spots from 1998 to 2011. The angular separation between the two groups increased by similar to 10 mas, which corresponds to an expansion velocity of similar to 10 km s(-1). Some velocity gradient (similar to 10(-2) km s(-1) mas(-1)) in the overall distribution was found. The internal motion between the maser groups support the hypothesis that the methanol masers in S269 could trace a bipolar outflow.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	HIGH-MASS STAR ; JAPANESE VLBI NETWORK ; 6.7 GHZ ; HIGH-RESOLUTION ; FORMING REGIONS ; IRAS SOURCES ; CIRCUMSTELLAR DISKS ; OH SOURCES ; EMISSION ; OUTFLOW
收录类别	SCI
语种	英语
WOS记录号	WOS:000330328300010
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/18047]
专题	上海天文台_星系宇宙学重点实验室
作者单位	1.Natl Astron Observ Japan, Mizusawa VLBI Observ, Mizusawa Ku, Oshu, Iwate 0230861, Japan 2.Yamaguchi Univ, Grad Sch Sci & Engn, Yamaguchi 7538512, Japan 3.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 4.Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan 5.Grad Univ Adv Studies, Dept Astron, Mitaka, Tokyo 1818588, Japan
推荐引用方式 GB/T 7714	Sawada-Satoh, Satoko,Fujisawa, Kenta,Sugiyama, Koichiro,et al. Internal Motion of 6.7-GHz Methanol Masers in H II Region S269[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2013,65(4):1.
APA	Sawada-Satoh, Satoko,Fujisawa, Kenta,Sugiyama, Koichiro,Wajima, Kiyoaki,&Honma, Mareki.(2013).Internal Motion of 6.7-GHz Methanol Masers in H II Region S269.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,65(4),1.
MLA	Sawada-Satoh, Satoko,et al."Internal Motion of 6.7-GHz Methanol Masers in H II Region S269".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 65.4(2013):1.