P-MaNGA: GRADIENTS IN RECENT STAR FORMATION HISTORIES AS DIAGNOSTICS FOR GALAXY GROWTH AND DEATH
文献类型：期刊论文
| 作者 | Li, Cheng1; Wang, Enci1; Lin, Lin1 ; Bershady, Matthew A.2; Bundy, Kevin3; Tremonti, Christy A.2; Xiao, Ting1; Yan, Renbin4; Bizyaev, Dmitry5,6; Blanton, Michael7
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2015-05-10 |
| 卷号 | 804期号:2页码:1 |
| 关键词 | galaxies: evolution galaxies: formation galaxies: general galaxies: stellar content methods: observational surveys |
| 英文摘要 | We present an analysis of the data produced by the MaNGA prototype run (P-MaNGA), aiming to test how the radial gradients in recent star formation histories, as indicated by the 4000 angstrom break ((4000)), H delta absorption (EW(H delta(A))), and H alpha emission (EW(H alpha)) indices, can be useful for understanding disk growth and star formation cessation in local galaxies. We classify 12 galaxies observed on two P-MaNGA plates as either centrally quiescent (CQ) or centrally star-forming (CSF), according to whether D-n(4000) measured in the central spaxel of each datacube exceeds 1.6. For each spaxel we generate both 2D maps and radial profiles of D-n(4000), EW(HdA), and EW(Ha). We find that CSF galaxies generally show very weak or no radial variation in these diagnostics. In contrast, CQ galaxies present significant radial gradients, in the sense that D-n(4000) decreases, while both EW (HdA) and EW(Ha) increase from the galactic center outward. The outer regions of the galaxies show greater scatter on diagrams relating the three parameters than their central parts. In particular, the clear separation between centrally measured quiescent and star-forming galaxies in these diagnostic planes is largely filled in by the outer parts of galaxies whose global colors place them in the green valley, supporting the idea that the green valley represents a transition between blue-cloud and red-sequence phases, at least in our small sample. These results are consistent with a picture in which the cessation of star formation propagates from the center of a galaxy outward. as it moves to the red sequence. |
| 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 DIAGRAM ; STELLAR POPULATION GRADIENTS ; BAND OPTICAL-PROPERTIES ; ACTIVE GALACTIC NUCLEI ; RED-SEQUENCE GALAXIES ; SIMILAR-TO 2 ; H-I ; BLACK-HOLES ; QUIESCENT GALAXIES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000354905000047 |
| 公开日期 | 2015-08-18 |
| 源URL | [http://119.78.226.72/handle/331011/18342]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Shanghai Astron Observ, Max Planck Inst Astrophys, Partner Grp, Shanghai 200030, Peoples R China 2.Univ Wisconsin, Dept Astron, Madison, WI 53706 USA 3.Univ Tokyo, Todai Inst Adv Study, Kavli Inst Phys & Math Universe Kavli IPMU, WPI, Kashiwa, Chiba 2778583, Japan 4.Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA 5.Apache Point Observ, Sunspot, NM 88349 USA 6.New Mexico State Univ, Sunspot, NM 88349 USA 7.NYU, Dept Phys, Ctr Cosmol & Particle Phys, New York, NY 10003 USA 8.Yale Univ, Dept Phys, Yale Ctr Astron & Astrophys, New Haven, CT 06520 USA 9.Univ Toronto, Dunlap Inst Astron & Astrophys, Toronto, ON M5S 3H4, Canada 10.Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA |
| 推荐引用方式 GB/T 7714 | Li, Cheng,Wang, Enci,Lin, Lin,et al. P-MaNGA: GRADIENTS IN RECENT STAR FORMATION HISTORIES AS DIAGNOSTICS FOR GALAXY GROWTH AND DEATH[J]. ASTROPHYSICAL JOURNAL,2015,804(2):1. |
| APA | Li, Cheng.,Wang, Enci.,Lin, Lin.,Bershady, Matthew A..,Bundy, Kevin.,...&Zheng, Tiantian.(2015).P-MaNGA: GRADIENTS IN RECENT STAR FORMATION HISTORIES AS DIAGNOSTICS FOR GALAXY GROWTH AND DEATH.ASTROPHYSICAL JOURNAL,804(2),1. |
| MLA | Li, Cheng,et al."P-MaNGA: GRADIENTS IN RECENT STAR FORMATION HISTORIES AS DIAGNOSTICS FOR GALAXY GROWTH AND DEATH".ASTROPHYSICAL JOURNAL 804.2(2015):1. |
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来源：上海天文台
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