PMO OpenIR  > 星系中的恒星形成研究团组
Tidal dwarf galaxies at intermediate redshifts
Wen, Zhang-Zheng1,2; Zheng, Xian-Zhong1; Zhao, Ying-He1; Gao, Yu1
2012-02-01
Source PublicationASTROPHYSICS AND SPACE SCIENCE
ISSN0004-640X
Volume337Issue:2Pages:729-737
AbstractWe present the first attempt at measuring the production rate of tidal dwarf galaxies (TDGs) and estimating their contribution to the overall dwarf population. Using HST/ACS deep imaging data from GOODS and GEMS surveys in conjunction with photometric redshifts from COMBO-17 survey, we performed a morphological analysis for a sample of merging/interacting galaxies in the Extended Chandra Deep Field South and identified tidal dwarf candidates in the rest-frame optical bands. We estimated a production rate about 1.4 x 10(-5) per Gyr per comoving volume for long-lived TDGs with stellar mass 3x10(8-9) M-circle dot at 0.5 < z < 1.1. Together with galaxy merger rates and TDG survival rate from the literature, our results suggest that only a marginal fraction (less than 10%) of dwarf galaxies in the local universe could be tidally-originated. TDGs in our sample are on average bluer than their host galaxies in the optical. Stellar population modelling of optical to near-infrared spectral energy distributions (SEDs) for two TDGs favors a burst component with age 400/200 Myr and stellar mass 40%/26% of the total, indicating that a young stellar population newly formed in TDGs. This is consistent with the episodic star formation histories found for nearby TDGs.
KeywordGalaxies: Dwarf Galaxies Galaxies: Evolution
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s10509-011-0882-8
WOS KeywordULTRA DEEP FIELD ; STAR-FORMATION HISTORIES ; COMPACT-GROUPS ; FORMING GALAXIES ; INTERACTING GALAXIES ; DYNAMICAL EVOLUTION ; LUMINOSITY FUNCTION ; INFRARED PROPERTIES ; IRREGULAR GALAXIES ; MASSIVE GALAXIES
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000299849400025
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8075
Collection星系中的恒星形成研究团组
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wen, Zhang-Zheng,Zheng, Xian-Zhong,Zhao, Ying-He,et al. Tidal dwarf galaxies at intermediate redshifts[J]. ASTROPHYSICS AND SPACE SCIENCE,2012,337(2):729-737.
APA Wen, Zhang-Zheng,Zheng, Xian-Zhong,Zhao, Ying-He,&Gao, Yu.(2012).Tidal dwarf galaxies at intermediate redshifts.ASTROPHYSICS AND SPACE SCIENCE,337(2),729-737.
MLA Wen, Zhang-Zheng,et al."Tidal dwarf galaxies at intermediate redshifts".ASTROPHYSICS AND SPACE SCIENCE 337.2(2012):729-737.
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