NEW ESTIMATES OF THE INCLINATION, POSITION ANGLE, PITCH ANGLE, AND SCALE HEIGHT OF THE WHIRLPOOL GALAXY

	NEW ESTIMATES OF THE INCLINATION, POSITION ANGLE, PITCH ANGLE, AND SCALE HEIGHT OF THE WHIRLPOOL GALAXY
	Hu, Tao 1,2; Shao, Zhengyi3 ; Peng, Qiuhe 4
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2013-01-10
卷号	762 期号:2 页码:1
关键词	galaxies: individual (M51) galaxies: spiral galaxies: structure
英文摘要	The inclination (i) and position angle (PA) of the Whirlpool galaxy (M51) are critical to modeling and interpreting observations. Here we make improved estimates of these parameters by fitting logarithmic spirals to the main arms. From separate fits to each major arm, we obtain i = 20 degrees.3 +/- 2 degrees.8 and PA = 12 degrees.0 +/- 2 degrees.5. We then use Poisson's equation for the logarithmic perturbation of the density to estimate the mean vertical scale height (H) of M51 to be 95-178 pc.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	SPIRAL GALAXIES ; STELLAR KINEMATICS ; MILKY-WAY ; M51 ; THICKNESS ; DISKS ; DISTANCES ; DYNAMICS ; REGIONS ; FIELD
收录类别	SCI
语种	英语
WOS记录号	WOS:000325876300012
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/18042]
专题	上海天文台_星系宇宙学重点实验室
作者单位	1.Shanghai Univ, Dept Automat, Shanghai 200072, Peoples R China 2.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 3.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 4.Nanjing Univ, Dept Astron, Nanjing 210093, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Hu, Tao,Shao, Zhengyi,Peng, Qiuhe. NEW ESTIMATES OF THE INCLINATION, POSITION ANGLE, PITCH ANGLE, AND SCALE HEIGHT OF THE WHIRLPOOL GALAXY[J]. ASTROPHYSICAL JOURNAL LETTERS,2013,762(2):1.
APA	Hu, Tao,Shao, Zhengyi,&Peng, Qiuhe.(2013).NEW ESTIMATES OF THE INCLINATION, POSITION ANGLE, PITCH ANGLE, AND SCALE HEIGHT OF THE WHIRLPOOL GALAXY.ASTROPHYSICAL JOURNAL LETTERS,762(2),1.
MLA	Hu, Tao,et al."NEW ESTIMATES OF THE INCLINATION, POSITION ANGLE, PITCH ANGLE, AND SCALE HEIGHT OF THE WHIRLPOOL GALAXY".ASTROPHYSICAL JOURNAL LETTERS 762.2(2013):1.