Measuring the Metallicity of Early-type Galaxies
文献类型：期刊论文
| 作者 | Wu, Yu-Zhong |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2020-04-01 |
| 卷号 | 893期号:2页码:5 |
| 关键词 | Galaxy abundances Galaxy evolution Galaxy accretion |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/ab74d8 |
| 英文摘要 | We use data for 6048 early-type galaxies (ETGs) from Galaxy Zoo 1 that have been cross-matched with the catalog of the MPA-JHU emission-line measurements for the Sloan Digital Sky Survey Data Release 7. We measure the metallicity of these ETGs by excluding various ionization sources, and study other properties as well. We use the optimal division line of W2-W3 = 2.5 as a diagnostic tool, and for the first time derive metallicity measurements for 2218 ETGs. We find that these ETGs actually are closer to H ii regions as defined by Kauffmann et al. in the Baldwin-Philips-Terevich diagram, and they display younger stellar populations. We present a full mass-metallicity relation and find that most ETGs have lower metallicities than star-forming galaxies (SFGs) at a given galaxy stellar mass. We use five metallicity calibrators to check our results. We find that these metallicity indicators (R23, O32, and O3S2) give consistent results. We suggest that the remaining two metallicity calibrators, which increase metallicity by N-enrichment, can be used to calibrate metallicities for SFGs, but not to estimate the metallicities of ETGs. |
| WOS关键词 | RECENT STAR-FORMATION ; HOST GALAXIES ; INTERSTELLAR MATTER ; ELLIPTIC GALAXIES ; ATLAS(3D) PROJECT ; EMISSION-LINES ; MOLECULAR GAS ; DATA RELEASE ; MASS ; DUST |
| 资助项目 | Natural Science Foundation of China (NSFC)[11703044] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000528919400001 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | 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) ; Natural Science Foundation of China (NSFC) |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/55041]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Wu, Yu-Zhong |
| 作者单位 | Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Yu-Zhong. Measuring the Metallicity of Early-type Galaxies[J]. ASTROPHYSICAL JOURNAL LETTERS,2020,893(2):5. |
| APA | Wu, Yu-Zhong.(2020).Measuring the Metallicity of Early-type Galaxies.ASTROPHYSICAL JOURNAL LETTERS,893(2),5. |
| MLA | Wu, Yu-Zhong."Measuring the Metallicity of Early-type Galaxies".ASTROPHYSICAL JOURNAL LETTERS 893.2(2020):5. |
入库方式： OAI收割
来源：国家天文台
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