PMO OpenIR  > 星系中的恒星形成研究团组
A Research on the Evolution of Star Formation Activities of Early-type Galaxies
Wang, Fang ; Zheng, Xian-Zhong
2011
Source PublicationChinese Astronomy and Astrophysics
ISSN0275-1062
Volume35Issue:4Pages:362-371
AbstractThe observational investigation of the evolution of the star formation activities of early-type galaxies (ETGs) with redshifts helps us to understand the formation and evolution of this kind of galaxies. Combined with the highresolution images from HST/ACS (Hubble Space Telescope/Advanded Camera for Surveys) of the GEMS (Galaxy Evolution fromMorphology and SEDs) survey and the multi-band data from Spitzer, GALEX (Galaxy Evolution Explorer) and so on in the CDFS (Chandra Deep Field South) field, a complete sample including 456 ETGs with their redshifts in the range of 0 . 2 ≤ z ≤ 1 . 0 is selected on the basis of morphology, color and stellar mass. By using the stacking technique, the ultraviolet and infrared average luminosities of sample galaxies are measured, and the star formation rates of ETGs are estimated. The results indicate that the star formation rates of ETGs are relatively low (< 3 M yr -1 ) and decrease with decreasing redshifts. The mass contributed by the star formation since z = 1 is less than 15%. The analyses of stellar populations also confirm that the bulk of the population of massive ETGs was formed in the early universe ( z > 2).
Subject AreaAstronomy & Astrophysics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8080
Collection星系中的恒星形成研究团组
Recommended Citation
GB/T 7714
Wang, Fang,Zheng, Xian-Zhong. A Research on the Evolution of Star Formation Activities of Early-type Galaxies[J]. Chinese Astronomy and Astrophysics,2011,35(4):362-371.
APA Wang, Fang,&Zheng, Xian-Zhong.(2011).A Research on the Evolution of Star Formation Activities of Early-type Galaxies.Chinese Astronomy and Astrophysics,35(4),362-371.
MLA Wang, Fang,et al."A Research on the Evolution of Star Formation Activities of Early-type Galaxies".Chinese Astronomy and Astrophysics 35.4(2011):362-371.
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