The clustering of galaxies as a function of their photometrically estimated atomic gas content

	The clustering of galaxies as a function of their photometrically estimated atomic gas content
	Li, Cheng 1,2; Kauffmann, Guinevere 3; Fu, Jian1,2,3 ; Wang, Jing 3,4; Catinella, Barbara 3; Fabello, Silvia 3; Schiminovich, David 5; Zhang, Wei 6
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2012-08-01
卷号	424 期号:2 页码:1471-1482
关键词	galaxies: clusters: general galaxies: distances and redshifts cosmology: theory dark matter large-scale structure of Universe
英文摘要	We introduce a new photometric estimator of the H i mass fraction () in local galaxies, which is a linear combination of four parameters: stellar mass, stellar surface mass density, NUV-r colour and g-i colour gradient. It is calibrated using samples of nearby galaxies (0.025 < z < 0.05) with H i line detections from the GALEX Arecibo SDSS Survey (GASS) and Arecibo Legacy Fast ALFA (ALFALFA) surveys, and it is demonstrated to provide unbiased estimates even for H i-rich galaxies. We apply this estimator to a sample of similar to 24 000 galaxies from the Sloan Digital Sky Survey (SDSS)/Data Release 7 (DR7) in the same redshift range. We then bin these galaxies by stellar mass and H i mass fraction and compute projected two-point cross-correlation functions with respect to a reference galaxy sample. Results are compared with predictions from current semi-analytic models of galaxy formation. The agreement is good for galaxies with stellar masses larger than 1010 M?, but not for lower mass systems. We then extend the analysis by studying the bias in the clustering of H i-poor or H i-rich galaxies with respect to galaxies with normal H i content on scales between 100 kpc and similar to 5 Mpc. For the H i-deficient population, the strongest bias effects arise when the H i deficiency is defined in comparison to galaxies of the same stellar mass and size. This is not reproduced by the semi-analytic models, where the quenching of star formation in satellites occurs by starvation and does not depend on their internal structure. H i-rich galaxies with masses greater than 1010 M? are found to be antibiased compared to galaxies with normal H i content. Interestingly, no such effect is found for lower mass galaxies.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	DIGITAL SKY SURVEY ; ARECIBO SDSS SURVEY ; STAR-FORMING GALAXIES ; DARK-MATTER HALOES ; IRAM LEGACY SURVEY ; FAST ALPHA SURVEY ; MASSIVE GALAXIES ; LOCAL UNIVERSE ; MOLECULAR GAS ; DATA RELEASE
收录类别	SCI
语种	英语
WOS记录号	WOS:000306356800053
公开日期	2015-01-27
内容类型	期刊论文
源URL	[http://119.78.226.72//handle/331011/15452]
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, Max Planck Inst Astrophys, Partner Grp, Shanghai 200030, Peoples R China 2.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 3.Max Planck Inst Astrophys, D-85741 Garching, Germany 4.Univ Sci & Technol China, Dept Astron, Hefei 230026, Peoples R China 5.Columbia Univ, Dept Astron, New York, NY 10027 USA 6.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Li, Cheng,Kauffmann, Guinevere,Fu, Jian,et al. The clustering of galaxies as a function of their photometrically estimated atomic gas content[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2012,424(2):1471-1482.
APA	Li, Cheng.,Kauffmann, Guinevere.,Fu, Jian.,Wang, Jing.,Catinella, Barbara.,...&Zhang, Wei.(2012).The clustering of galaxies as a function of their photometrically estimated atomic gas content.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,424(2),1471-1482.
MLA	Li, Cheng,et al."The clustering of galaxies as a function of their photometrically estimated atomic gas content".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 424.2(2012):1471-1482.