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Measuring the Metallicity of Early-type Galaxies. I. Composite Region
Wu, Yu-Zhong
2021
Source PublicationASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
ISSN0067-0049
Volume252Issue:1Pages:9
AbstractWe present the data of 9739 early-type galaxies (ETGs), cross-matching Galaxy Zoo 1 with our sample selected from the catalog of the Sloan Digital Sky Survey Data Release 7 of MPA-JHU emission-line measurements. We first investigate the divisor between ETGs with and without star formation (SF), and find the best separator of W2-W3 = 2.0 is added. We explore the ETG sample by refusing a variety of ionization sources, and derive 5376 ETGs with SF by utilizing a diagnostic tool of the division line of W2-W3 = 2.0. We measure their metallicities with four abundance calibrators. We find that our composite ETG sample has similar distributions of M-* and star formation rate as star-forming galaxies (SFGs) do, that most of them lie on the "main sequence," and that our fit is a slightly steeper slope than that derived in Renzini & Peng. Compared with the distributions between different metallicities calibrated by four abundance indicators, we find that the Curti17 method is the most accurate calibrator for composite ETGs among the four abundance indicators. We present a weak positive correlation of SFR and metallicity only when the metallicity is calibrated by the PP04, Curti17, and T04 indicators. The correlation is not consistent with the negative correlation of both parameters in SFGs. We suggest that the weak correlation is due to the dilution effect of gas inflow driven by minor mergers.
KeywordEarly-type galaxies Galaxy abundances Galaxy evolution
Funding OrganizationNatural Science Foundation of China (NSFC) ; Natural Science Foundation of China (NSFC) ; Natural Science Foundation of China (NSFC) ; Natural Science Foundation of China (NSFC) ; Natural Science Foundation of China (NSFC) ; Natural Science Foundation of China (NSFC) ; Natural Science Foundation of China (NSFC) ; Natural Science Foundation of China (NSFC)
DOI10.3847/1538-4365/abc0f1
WOS KeywordDIGITAL SKY SURVEY ; RECENT STAR-FORMATION ; HOST GALAXIES ; SAURON PROJECT ; EMISSION-LINES ; MINOR MERGERS ; DATA RELEASE ; GAS ; CLASSIFICATION ; MASS
Language英语
Funding ProjectNatural Science Foundation of China (NSFC)[11703044] ; Natural Science Foundation of China (NSFC)[12073047]
Funding OrganizationNatural Science Foundation of China (NSFC) ; Natural Science Foundation of China (NSFC) ; Natural Science Foundation of China (NSFC) ; Natural Science Foundation of China (NSFC) ; Natural Science Foundation of China (NSFC) ; Natural Science Foundation of China (NSFC) ; Natural Science Foundation of China (NSFC) ; Natural Science Foundation of China (NSFC)
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000605839700001
PublisherIOP PUBLISHING LTD
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/79887
Collection中国科学院国家天文台
Corresponding AuthorWu, Yu-Zhong
AffiliationNatl Astron Observ, CAS Key Lab Opt Astron, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Wu, Yu-Zhong. Measuring the Metallicity of Early-type Galaxies. I. Composite Region[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2021,252(1):9.
APA Wu, Yu-Zhong.(2021).Measuring the Metallicity of Early-type Galaxies. I. Composite Region.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,252(1),9.
MLA Wu, Yu-Zhong."Measuring the Metallicity of Early-type Galaxies. I. Composite Region".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 252.1(2021):9.
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