The local spiral structure of the Milky Way.

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	The local spiral structure of the Milky Way.
	Xu, Ye; Reid, Mark; Dame, Thomas; Menten, Karl; Sakai, Nobuyuki; Li, Jingjing; Brunthaler, Andreas; Moscadelli, Luca; Zhang, Bo; Zheng, Xingwu
刊名	Science advances
	2016
卷号	2 期号:9 页码:e1600878-e1600878
英文摘要	The nature of the spiral structure of the Milky Way has long been debated. Only in the last decade have astronomers been able to accurately measure distances to a substantial number of high-mass star-forming regions, the classic tracers of spiral structure in galaxies. We report distance measurements at radio wavelengths using the Very Long Baseline Array for eight regions of massive star formation near the Local spiral arm of the Milky Way. Combined with previous measurements, these observations reveal that the Local Arm is larger than previously thought, and both its pitch angle and star formation rate are comparable to those of the Galaxy's major spiral arms, such as Sagittarius and Perseus. Toward the constellation Cygnus, sources in the Local Arm extend for a great distance along our line of sight and roughly along the solar orbit. Because of this orientation, these sources cluster both on the sky and in velocity to form the complex and long enigmatic Cygnus X region. We also identify a spur that branches between the Local and Sagittarius spiral arms.
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/16900]
专题	紫金山天文台_紫金山天文台青海观测站
推荐引用方式 GB/T 7714	Xu, Ye,Reid, Mark,Dame, Thomas,et al. The local spiral structure of the Milky Way.[J]. Science advances,2016,2(9):e1600878-e1600878.
APA	Xu, Ye.,Reid, Mark.,Dame, Thomas.,Menten, Karl.,Sakai, Nobuyuki.,...&Zheng, Xingwu.(2016).The local spiral structure of the Milky Way..Science advances,2(9),e1600878-e1600878.
MLA	Xu, Ye,et al."The local spiral structure of the Milky Way.".Science advances 2.9(2016):e1600878-e1600878.