The spiral structure of the Milky Way

被引：53
作者：
Xu, Ye [1 ]
Hou, Li-Gang [2 ,3 ]
Wu, Yuan-Wei [4 ]
机构：
[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
来源：
RESEARCH IN ASTRONOMY AND ASTROPHYSICS | 2018年 / 18卷 / 12期
关键词：
Galaxy: structure; Galaxy: kinematics and dynamics; masers; techniques: high Galaxy: structure; techniques: high angular resolution; astrometry; stars: formationangular resolution; stars: formation; 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;
D O I：
10.1088/1674-4527/18/12/146
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
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.
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相关论文
共 190 条
[1]  
Alexander S., 1852, AJ, V2, P95, DOI [10.1086/ 100227, DOI 10.1086/100227, 10.1086/100227]
[2]   THE ROTATION OF THE GALAXY WITHIN THE SOLAR CIRCLE [J].
ALVAREZ, H ;
MAY, J ;
BRONFMAN, L .
ASTROPHYSICAL JOURNAL, 1990, 348 (02) :495-502
[3]   FINDING DISTANT GALACTIC H II REGIONS [J].
Anderson, L. D. ;
Armentrout, W. P. ;
Johnstone, B. M. ;
Banta, T. M. ;
Balser, Dana S. ;
Wenger, Trey V. ;
Cunningham, V. .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2015, 221 (02)
[4]   THE GREEN BANK TELESCOPE H II REGION DISCOVERY SURVEY. III. KINEMATIC DISTANCES [J].
Anderson, L. D. ;
Bania, T. M. ;
Balser, Dana S. ;
Rood, Robert T. .
ASTROPHYSICAL JOURNAL, 2012, 754 (01)
[5]   Astrometry of Galactic Star-Forming Region ON 2 N with VERA: Estimation of the Galactic Constants [J].
Ando, Kazuma ;
Nagayama, Takumi ;
Omodaka, Toshihiro ;
Handa, Toshihiro ;
Imai, Hiroshi ;
Nakagawa, Akiharu ;
Nakanishi, Hiroyuki ;
Honma, Mareki ;
Kobayashi, Hideyuki ;
Miyaji, Takeshi .
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, 2011, 63 (01) :45-51
[6]   DISTANCE AND PROPER MOTION MEASUREMENT OF THE RED SUPERGIANT, S PERSEI, WITH VLBI H2O MASER ASTROMETRY [J].
Asaki, Y. ;
Deguchi, S. ;
Imai, H. ;
Hachisuka, K. ;
Miyoshi, M. ;
Honma, M. .
ASTROPHYSICAL JOURNAL, 2010, 721 (01) :267-277
[7]  
AVEDISOVA VS, 1985, SOV ASTRON LETT+, V11, P185
[8]   On the Interpretation of the l-v Features in the Milky Way Galaxy [J].
Baba, Junichi ;
Saitoh, Takayuki R. ;
Wada, Keiichi .
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, 2010, 62 (06) :1413-1422
[9]   The nature of the methanol maser ring G23.657-00.127 I. The distance through trigonometric parallax measurements [J].
Bartkiewicz, A. ;
Brunthaler, A. ;
Szymczak, M. ;
van Langevelde, H. J. ;
Reid, M. J. .
ASTRONOMY & ASTROPHYSICS, 2008, 490 (02) :787-792
[10]  
Becker W, 1964, IAU S, V20, P16
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