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Color gradients of spiral disks in the Sloan Digital Sky Survey

文献类型：期刊论文

作者Liu, Cheng-Ze1,2,3,4; Shen, Shi-Yin1,3; Shao, Zheng-Yi1,3; Chang, Rui-Xiang1,3; Hou, Jin-Liang1; Yin, Jun1,2; Yang, Da-Wei4
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期2009-10-01
卷号9期号:10页码:1119-1130
关键词galaxies: spiral galaxies: statistics galaxies: evolution galaxies: fundamental parameters (color gradient luminosity radius surface brightness)
英文摘要We investigate the radial color gradients of galactic disks using a sample of similar to 20 000 face-on spiral galaxies selected from the fourth data release of the Sloan Digital Sky Survey (SDSS-DR4). We combine galaxies with similar concentrations, sizes and luminosities to construct composite galaxies, and then measure their color profiles by stacking the azimuthally averaged radial color profiles of all the member galaxies. Except for the smallest galaxies (R(50) < 3 kpc), almost all galaxies show negative disk color gradients with mean g - r gradient <(G)over bar>(gr) = -0.006 mag kpc(-1) and r - z gradient (G) over bar (rz) = -0.018 mag kpc(-1). The disk color gradients are independent of the morphological types of galaxies and strongly dependent on the disk surface brightness mu(d), with lower surface brightness galactic disks having steeper color gradients. We quantify the intrinsic correlation between color gradients and surface brightness as G(gr) = -0.011 mu(d) + 0.2333 and G(rz) = -0.015 mu d + 0.324. These quantified correlations provide tight observational constraints on the formation and evolution models of spiral galaxies.
WOS标题词Science & Technology ; Physical Sciences
学科主题星系与宇宙学研究中心
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
关键词[WOS]EARLY-TYPE GALAXIES ; CHEMO-SPECTROPHOTOMETRIC EVOLUTION ; BAND SURFACE PHOTOMETRY ; COMPACT DWARF GALAXIES ; STELLAR POPULATIONS ; DOMINATED GALAXIES ; DATA RELEASE ; GALACTIC DISKS ; BRIGHTNESS PROFILES ; FORMATION SCENARIOS
收录类别SCI
语种英语
WOS记录号WOS:000271266300004
公开日期2010-11-08
源URL[http://119.78.226.72//handle/331011/12252]  
专题上海天文台_星系宇宙学重点实验室
作者单位1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
3.Key Lab Astrophys, Shanghai 200234, Peoples R China
4.Hebei Normal Univ, Dept Phys, Shijiazhuang 050016, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Cheng-Ze,Shen, Shi-Yin,Shao, Zheng-Yi,et al. Color gradients of spiral disks in the Sloan Digital Sky Survey[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2009,9(10):1119-1130.
APA Liu, Cheng-Ze.,Shen, Shi-Yin.,Shao, Zheng-Yi.,Chang, Rui-Xiang.,Hou, Jin-Liang.,...&Yang, Da-Wei.(2009).Color gradients of spiral disks in the Sloan Digital Sky Survey.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,9(10),1119-1130.
MLA Liu, Cheng-Ze,et al."Color gradients of spiral disks in the Sloan Digital Sky Survey".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 9.10(2009):1119-1130.

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来源：上海天文台

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