SDSS-IV MaNGA: stellar population gradients as a function of galaxy environment
文献类型：期刊论文
| 作者 | Goddard, D.1; Thomas, D.1; Maraston, C.1; Westfall, K.1; Etherington, J.1; Riffel, R.2,3; Mallmann, N. D.2,3; Zheng, Z.4 ; Argudo-Fernandez, M.5; Bershady, M.6
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2017-02-11 |
| 卷号 | 465期号:1页码:688-700 |
| 关键词 | surveys galaxies: elliptical and lenticular, cD galaxies: evolution galaxies: formation galaxies: spiral galaxies: stellar content |
| 英文摘要 | We study the internal radial gradients of stellar population properties within 1.5 R-e and analyse the impact of galaxy environment. We use a representative sample of 721 galaxies with masses ranging between 10(9)M(circle dot) and 10(11.5)M(circle dot) from the SDSS-IV survey MaNGA. We split this sample by morphology into early-type and late-type galaxies. Using the full spectral fitting code FIREFLY, we derive the light and mass-weighted stellar population properties, age and metallicity, and calculate the gradients of these properties. We use three independent methods to quantify galaxy environment, namely the Nth nearest neighbour, the tidal strength parameter Q and distinguish between central and satellite galaxies. In our analysis, we find that early-type galaxies generally exhibit shallowlight-weighted age gradients in agreement with the literature and mass-weighted median age gradients tend to be slightly positive. Late-type galaxies, instead, have negative light-weighted age gradients. We detect negative metallicity gradients in both early-and late-type galaxies that correlate with galaxy mass, with the gradients being steeper and the correlation with mass being stronger in late-types. We find, however, that stellar population gradients, for both morphological classifications, have no significant correlation with galaxy environment for all three characterizations of environment. Our results suggest that galaxy mass is the main driver of stellar population gradients in both early and late-type galaxies, and any environmental dependence, if present at all, must be very subtle. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | DIGITAL SKY SURVEY ; COLOR-MAGNITUDE RELATION ; INITIAL MASS FUNCTION ; LARGE-SCALE STRUCTURE ; CALIFA SURVEY ; DARK-MATTER ; BRIGHTEST CLUSTER ; SAURON PROJECT ; STAR-FORMATION ; DATA RELEASE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000393782000048 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8294]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Univ Portsmouth, Inst Cosmol & Gravitat, Burnaby Rd, Portsmouth PO1 3FX, Hants, England 2.Univ Fed Rio Grande do Sul, Inst Fis, Campus Vale, Porto Alegre, RS, Brazil 3.Lab Interinst E Astron, Rua Gen Jose Cristino,77 Vasco da Gama, Rio De Janeiro, Brazil 4.Chinese Acad Sci, Natl Astron Observ, A20 Datun Rd, Beijing 100012, Peoples R China 5.Univ Antofagasta, Fac Cs Basicas, Unidad Astron, Avda U Antofagasta, Antofagasta 02800, Chile 6.Univ Wisconsin, Dept Astron, 475 N Charter St, Madison, WI 53706 USA 7.Univ Tokyo, Inst Adv Study, Kavli InstitGute Phys & Math Universe WPI, Kashiwa, Chiba 2778583, Japan 8.Univ Texas Austin, Dept Astron, McDonald Observ, Univ Stn 1, Austin, TX 78712 USA 9.Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA 10.Univ Kentucky, Dept Phys & Astron, 505 Rose St, Lexington, KY 40506 USA |
| 推荐引用方式 GB/T 7714 | Goddard, D.,Thomas, D.,Maraston, C.,et al. SDSS-IV MaNGA: stellar population gradients as a function of galaxy environment[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,465(1):688-700. |
| APA | Goddard, D..,Thomas, D..,Maraston, C..,Westfall, K..,Etherington, J..,...&Storchi-Bergmann, T..(2017).SDSS-IV MaNGA: stellar population gradients as a function of galaxy environment.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,465(1),688-700. |
| MLA | Goddard, D.,et al."SDSS-IV MaNGA: stellar population gradients as a function of galaxy environment".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 465.1(2017):688-700. |
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