Stellar mass estimation based on IRAC photometry for Spitzer SWIRE-field galaxies

	Stellar mass estimation based on IRAC photometry for Spitzer SWIRE-field galaxies
	Zhu, Yi-Nan1,2 ; Wu, Hong1 ; Li, Hai-Ning1,2 ; Cao, Chen 3
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2010-04-01
卷号	10 期号:4 页码:329-347
关键词	galaxies: stellar content galaxies: active infrared: galaxies
英文摘要	We analyze the feasibility of estimating the stellar mass of galaxies by mid-infrared luminosities based on a large sample of galaxies cross-identified from Spitzer SWIRE fields and the SDSS spectrographic survey. We derived the formulae to calculate the stellar mass by using IRAC 3.6 mu m and 4.5 mu m luminosities. The mass-to-luminosity ratios of IRAC 3.6 mu m and 4.5 mu m luminosities are more sensitive to the star formation history of galaxies than to other factors, such as the intrinsic extinction,. metallicity and star formation rate. To remove the effect of star formation history, we used g-r color to recalibrate the formulae and obtain a better result. Researchers must. be more careful when estimating the stellar mass of low metallicity galaxies using our formulae. Due to the emission from dust heated by the hottest young stars, luminous infrared galaxies present higher IRAC 4.5 mu m luminosities compared to IRAC 3.6 mu m luminosities. For most of type-II AGNs, the nuclear activity cannot enhance 3.6 mu m and 4.5 mu m luminosities compared with normal galaxies. Star formation in our AGN-hosting galaxies is also very weak, almost all of which are early-type galaxies.
收录类别	SCI
语种	英语
WOS记录号	WOS:000277201300004
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/7647]
专题	国家天文台_光学天文研究部
作者单位	1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Shandong Univ, Inst Space Sci & Phys, Weihai 264209, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Yi-Nan,Wu, Hong,Li, Hai-Ning,et al. Stellar mass estimation based on IRAC photometry for Spitzer SWIRE-field galaxies[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2010,10(4):329-347.
APA	Zhu, Yi-Nan,Wu, Hong,Li, Hai-Ning,&Cao, Chen.(2010).Stellar mass estimation based on IRAC photometry for Spitzer SWIRE-field galaxies.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,10(4),329-347.
MLA	Zhu, Yi-Nan,et al."Stellar mass estimation based on IRAC photometry for Spitzer SWIRE-field galaxies".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 10.4(2010):329-347.