SDSS-IV MaNGA: Environmental Dependence of the Mgb/– Relation for Nearby Galaxies
文献类型：期刊论文
| 作者 | Zheng,Zheng1,2; Li,Cheng3; Mao,Shude1,3; Wang,Huiyuan4; Liu,Chao1; Mo,Houjun3,5; Yuan,Zhen6; Maraston,Claudia7; Thomas,Daniel7; Yan,Renbin8 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2019-03-05 |
| 卷号 | 873期号:1 |
| ISSN号 | 0004-637X |
| 关键词 | galaxies: abundances galaxies: evolution galaxies: general galaxies: statistics galaxies: stellar content galaxies: structure |
| DOI | 10.3847/1538-4357/ab03d2 |
| 英文摘要 | Abstract We use a sample of ～3000 galaxies from the MaNGA MPL-7 internal data release to study the α abundance distribution within low-redshift galaxies. We use the Lick index ratio Mgb/ as an α abundance indicator to study relationships between the α abundance distribution and galaxy properties such as effective stellar velocity dispersion within 0.3 effective radii (σ*), galaxy environment, and dark matter halo formation time (zf). We find that (1) all galaxies show a tight correlation between Mgb/ and (2) “old” (Hβ < 3) low-σ* galaxies in high local density environment and inner regions within galaxy groups are enhanced in Mgb/ , while “young” (Hβ > 3) galaxies and high-mass galaxies show no or less environmental dependence; (3) “old” galaxies with high-zf show enhanced Mgb/ over low- and medium-zf; and (4) Mgb/ gradients are close to zero and show dependence on σ* but no obvious dependence on the environment or zf. Our study indicates that stellar velocity dispersion or galaxy mass is the main parameter driving the Mgb/ enhancement, although environments appear to have modest effects, particularly for low- and medium-mass galaxies. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-873-1-AB03D2 |
| 源URL | [http://119.78.226.72/handle/331011/31875]  |
| 专题 | 中国科学院上海天文台 |
| 作者单位 | 1.National Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Chaoyang District, Beijing 100101, People's Republic of China 2.CAS Key Laboratory of FAST, Chinese Academy of Sciences, Beijing 100101, People's Republic of China 3.Tsinghua Center for Astrophysics and Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China 4.Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China 5.Department of Astronomy, University of Massachusetts Amherst, MA 01003, USA 6.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, People's Republic of China 7.Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Burnaby Road, Portsmouth, PO1 3FX, UK 8.University of Kentucky, Lexington, KY 40506, USA 9.Department of Astronomy and Astrophysics, University of California, 1156 High Street, Santa Cruz, CA 95064, USA 10.Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Oxford Road, Manchester M13 9PL, UK |
| 推荐引用方式 GB/T 7714 | Zheng,Zheng,Li,Cheng,Mao,Shude,et al. SDSS-IV MaNGA: Environmental Dependence of the Mgb/– Relation for Nearby Galaxies[J]. The Astrophysical Journal,2019,873(1). |
| APA | Zheng,Zheng.,Li,Cheng.,Mao,Shude.,Wang,Huiyuan.,Liu,Chao.,...&Lacerna,Ivan.(2019).SDSS-IV MaNGA: Environmental Dependence of the Mgb/– Relation for Nearby Galaxies.The Astrophysical Journal,873(1). |
| MLA | Zheng,Zheng,et al."SDSS-IV MaNGA: Environmental Dependence of the Mgb/– Relation for Nearby Galaxies".The Astrophysical Journal 873.1(2019). |
入库方式： OAI收割
来源：上海天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。