Disk thickness and spiral arm structure of M31

	Disk thickness and spiral arm structure of M31
	Hu, Tao 1,2,3; Shao, ZY 3; Wang M(汪敏)2 ; Peng, QH 4
刊名	NEW ASTRONOMY
	2013-10
卷号	23-24 页码:49-54
关键词	Galaxies: spiral Galaxies: structure Galaxies: individual (M31)
ISSN号	1384-1076
通讯作者	Hu, T (reprint author), Shanghai Univ, Dept Automat, 149 Yanchang Rd, Shanghai 200072, Peoples R China.
产权排序	第二完成单位
英文摘要	The objective of this work is to obtain the disk thickness and spiral arm structure of M31. The method to estimate the thickness of galactic disk is based on using Poisson's equation for the logarithmical matter density in three-dimensional disk galaxies. We use new infrared image of M31 at 24 mu m taken with the Multiband Imaging Photometer for Spitzer (MIPS). Far infrared images would be free of blurring by the bright bulge, so that the spiral arms can be traced inwards to smaller radii (the forbidden radii). We investigate the fitting of a two-armed (a- and b-arm) spiral structure of M31 by logarithmical spirals. From a-arm structure, we acquire the disk inclination gamma(a) = 74.5 +/- 1.5 degrees, and from b-arm structure, gamma(b) = 70.3 +/- 2.0 degrees. The mean values for the forbidden radius (r) over bar (0), the winding parameter (Lambda) over bar, and the disk thickness (H) over bar are 2.82 +/- 0.23 kpc, 12.49 +/- 1.50, and 0.45 +/- 0.09 kpc, respectively. (C) 2013 Elsevier B.V. All rights reserved.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	SURFACE PHOTOMETRY ; ANDROMEDA GALAXY ; 3-DIMENSIONAL DISTRIBUTION ; SPITZER MIPS ; STARS ; LIGHT ; PARAMETERS ; MODEL
收录类别	SCI
原文出处	http://www.sciencedirect.com/science/article/pii/S1384107613000146
语种	英语
WOS记录号	WOS:000319247200007
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5627]
专题	云南天文台_射电天文研究组云南天文台_中国科学院天体结构与演化重点实验室
作者单位	1.Department of Automation, Shanghai University, 149 Yanchang Rd., Shanghai 200072, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Yunnan Astronomical Observatory, Fenghuang Mountain, Kunming 650011, China 3.Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Rd., Shanghai 200030, China 4.Department of Astronomy, Nanjing University, 22 Hankou Rd., Nanjing 210093, China
推荐引用方式 GB/T 7714	Hu, Tao,Shao, ZY,Wang M,et al. Disk thickness and spiral arm structure of M31[J]. NEW ASTRONOMY,2013,23-24:49-54.
APA	Hu, Tao,Shao, ZY,Wang M,&Peng, QH.(2013).Disk thickness and spiral arm structure of M31.NEW ASTRONOMY,23-24,49-54.
MLA	Hu, Tao,et al."Disk thickness and spiral arm structure of M31".NEW ASTRONOMY 23-24(2013):49-54.