The spiral structure of the Milky Way

doi:10.1088/1674-4527/18/12/146

NTSC-IR

	The spiral structure of the Milky Way
	Xu, Ye 1; Hou, Li-Gang 2,3; Wu, Yuan-Wei 4
	2018-12-01
发表期刊	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN	1674-4527
卷号	18 期号:12 页码:20
摘要	The morphology and kinematics of the spiral structure of the Milky Way are long-standing problems in astrophysics. In this review we firstly summarize variousmethodswith different tracers used to solve this puzzle. The astrometry of Galactic sources is gradually alleviating this difficult situation caused mainly by large distance uncertainties, as we can currently obtain accurate parallaxes (a few mu as) and proper motions (approximate to 1 kms(-1)) by using Very Long Baseline Interferometry (VLBI). On the other hand, the Gaia mission is providing the largest, uniform sample of parallaxes for O-type stars in the entire Milky Way. Based upon the VLBI maser and Gaia O-star parallax measurements, nearby spiral structures of the Perseus, Local, Sagittarius and Scutum Arms are determined in unprecedented detail. Meanwhile, we estimate fundamental Galactic parameters of the distance to the Galactic center, R-0, to be 8.35 +/- 0.18 kpc, and circular rotation speed at the Sun, theta(0), to be 240 +/- 10 kms(-1). We found kinematic differences between O stars and interstellar masers: the O stars, on average, rotate faster, > 8 kms(-1) than maser-traced high-mass star forming regions.
关键词	Galaxy: structure Galaxy: kinematics and dynamics masers techniques: high Galaxy: structure Galaxy: kinematics and dynamics masers techniques: high angular resolution astrometry stars: formationangular resolution astrometry stars: formation
资助者	MOST ; MOST ; NSFC ; NSFC ; CAS ; CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Key Laboratory for Radio Astronomy, CAS ; Key Laboratory for Radio Astronomy, CAS ; Open Project Program of the Key Laboratory of FAST, NAOC, CAS ; Open Project Program of the Key Laboratory of FAST, NAOC, CAS ; MOST ; MOST ; NSFC ; NSFC ; CAS ; CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Key Laboratory for Radio Astronomy, CAS ; Key Laboratory for Radio Astronomy, CAS ; Open Project Program of the Key Laboratory of FAST, NAOC, CAS ; Open Project Program of the Key Laboratory of FAST, NAOC, CAS ; MOST ; MOST ; NSFC ; NSFC ; CAS ; CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Key Laboratory for Radio Astronomy, CAS ; Key Laboratory for Radio Astronomy, CAS ; Open Project Program of the Key Laboratory of FAST, NAOC, CAS ; Open Project Program of the Key Laboratory of FAST, NAOC, CAS ; MOST ; MOST ; NSFC ; NSFC ; CAS ; CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Key Laboratory for Radio Astronomy, CAS ; Key Laboratory for Radio Astronomy, CAS ; Open Project Program of the Key Laboratory of FAST, NAOC, CAS ; Open Project Program of the Key Laboratory of FAST, NAOC, CAS
DOI	10.1088/1674-4527/18/12/146
关键词[WOS]	STAR-FORMING REGION ; H-II REGIONS ; MOLECULAR CLOUD COMPLEXES ; RECONSTRUCTING CO MAPS ; TRIGONOMETRIC PARALLAXES ; OPEN CLUSTERS ; OUTER GALAXY ; 3-DIMENSIONAL DISTRIBUTION ; PHYSICAL-PROPERTIES ; GALACTIC STRUCTURE
语种	英语
资助项目	MOST[2017YFA0402701] ; NSFC[11873019] ; NSFC[11673066] ; NSFC[11503033] ; CAS[QYZDJ-SSW-SLH047] ; Youth Innovation Promotion Association of CAS ; Key Laboratory for Radio Astronomy, CAS ; Open Project Program of the Key Laboratory of FAST, NAOC, CAS
资助者	MOST ; MOST ; NSFC ; NSFC ; CAS ; CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Key Laboratory for Radio Astronomy, CAS ; Key Laboratory for Radio Astronomy, CAS ; Open Project Program of the Key Laboratory of FAST, NAOC, CAS ; Open Project Program of the Key Laboratory of FAST, NAOC, CAS ; MOST ; MOST ; NSFC ; NSFC ; CAS ; CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Key Laboratory for Radio Astronomy, CAS ; Key Laboratory for Radio Astronomy, CAS ; Open Project Program of the Key Laboratory of FAST, NAOC, CAS ; Open Project Program of the Key Laboratory of FAST, NAOC, CAS ; MOST ; MOST ; NSFC ; NSFC ; CAS ; CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Key Laboratory for Radio Astronomy, CAS ; Key Laboratory for Radio Astronomy, CAS ; Open Project Program of the Key Laboratory of FAST, NAOC, CAS ; Open Project Program of the Key Laboratory of FAST, NAOC, CAS ; MOST ; MOST ; NSFC ; NSFC ; CAS ; CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Key Laboratory for Radio Astronomy, CAS ; Key Laboratory for Radio Astronomy, CAS ; Open Project Program of the Key Laboratory of FAST, NAOC, CAS ; Open Project Program of the Key Laboratory of FAST, NAOC, CAS
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
WOS记录号	WOS:000454953800002
出版者	NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/11770
专题	中国科学院国家授时中心
通讯作者	Xu, Ye
作者单位	1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 2.Chinese Acad Sci, CAS Key Lab FAST, Natl Astron Observ, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China 4.Chinese Acad Sci, Natl Time Serv Ctr, Key Lab Precise Positioning & Timing Technol, Xian 710600, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Xu, Ye,Hou, Li-Gang,Wu, Yuan-Wei. The spiral structure of the Milky Way[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2018,18(12):20.
APA	Xu, Ye,Hou, Li-Gang,&Wu, Yuan-Wei.(2018).The spiral structure of the Milky Way.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,18(12),20.
MLA	Xu, Ye,et al."The spiral structure of the Milky Way".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 18.12(2018):20.