Galactic kinematics derived from classical cepheids

NTSC-IR

	Galactic kinematics derived from classical cepheids
	Zhu, Z
	1999-10-01
发表期刊	CHINESE ASTRONOMY AND ASTROPHYSICS
ISSN	0275-1062
卷号	23 期号:4 页码:445-453
摘要	On the basis of radial velocity and Hipparcos proper motion data, we have analyzed the galactic kinematics of classical Cepheids. Using the 3-D Ogorodnikov-Milne model we have determined the rotational velocity of the Galaxy to be V-0 = 240.5 +/- 10.2 km/s, on assuming a glactocentric distance of the Sun of R-0 = 8.5 kpc. The results clearly indicate a contracting motion in the solar neighbourhood of (partial derivative V-theta/partial derivative theta)/R = -2.60 +/- 1.07 km s(-1) kpc(-1), along the direction of galactic rotation. Possible reason for this motion is discussed. The solar motion found here is S. = 18.78 +/- 0.86 km/s in the direction l. = 54.4 degrees +/- 2.9 degrees and b. = +26.6 degrees +/- 2.6 degrees.
关键词	Galaxy kinematics cepheids
关键词[WOS]	VORTICITY VECTOR ; ROTATION ; PLANE
语种	英语
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
WOS记录号	WOS:000084530700006
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/10962
专题	中国科学院国家授时中心
通讯作者	Zhu, Z
作者单位	Chinese Acad Sci, Shaanxi Observ, Lintong 710600, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Z. Galactic kinematics derived from classical cepheids[J]. CHINESE ASTRONOMY AND ASTROPHYSICS,1999,23(4):445-453.
APA	Zhu, Z.(1999).Galactic kinematics derived from classical cepheids.CHINESE ASTRONOMY AND ASTROPHYSICS,23(4),445-453.
MLA	Zhu, Z."Galactic kinematics derived from classical cepheids".CHINESE ASTRONOMY AND ASTROPHYSICS 23.4(1999):445-453.