P-MaNGA: full spectral fitting and stellar population maps from prototype observations
文献类型：期刊论文
| 作者 | Wilkinson, David M.1; Maraston, Claudia1; Thomas, Daniel1; Coccato, Lodovico1,2; Tojeiro, Rita3; Cappellari, Michele4; Belfiore, Francesco5,6; Bershady, Matthew7; Blanton, Mike8; Bundy, Kevin9 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2015-05-01 |
| 卷号 | 449期号:1页码:328-360 |
| 关键词 | techniques: spectroscopic galaxies: evolution galaxies: formation galaxies: general galaxies: stellar content galaxies: structure |
| 英文摘要 | MaNGA (Mapping Nearby Galaxies at Apache Point Observatory) is a 6-yr SDSS-IV (Sloan Digital Sky Survey IV) survey that will obtain resolved spectroscopy from 3600 to 10 300 angstrom for a representative sample of over 10 000 nearby galaxies. In this paper, we derive spatially resolved stellar population properties and radial gradients by performing full spectral fitting of observed galaxy spectra from P-MaNGA, a prototype of the MaNGA instrument. These data include spectra for 18 galaxies, covering a large range of morphological type. We derive age, metallicity, dust, and stellar mass maps, and their radial gradients, using high spectral-resolution stellar population models, and assess the impact of varying the stellar library input to the models. We introduce a method to determine dust extinction which is able to give smooth stellar mass maps even in cases of high and spatially non-uniform dust attenuation. With the spectral fitting, we produce detailed maps of stellar population properties which allow us to identify galactic features among this diverse sample such as spiral structure, smooth radial profiles with little azimuthal structure in spheroidal galaxies, and spatially distinct galaxy sub-components. In agreement with the literature, we find the gradients for galaxies identified as early type to be on average flat in age, and negative (-0.15 dex/R-e) in metallicity, whereas the gradients for late-type galaxies are on average negative in age (-0.39 dex/R-e) and flat in metallicity. We demonstrate how different levels of data quality change the precision with which radial gradients can be measured. We show how this analysis, extended to the large numbers of MaNGA galaxies, will have the potential to shed light on galaxy structure and evolution. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | EARLY-TYPE GALAXIES ; DIGITAL SKY SURVEY ; INITIAL MASS FUNCTION ; STAR-FORMATION HISTORY ; SPATIALLY-RESOLVED SPECTROSCOPY ; ELEMENT ABUNDANCE RATIOS ; SDSS-III/BOSS GALAXIES ; ACTIVE GALACTIC NUCLEI ; 2.5 M TELESCOPE ; ELLIPTIC GALAXIES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000355345600025 |
| 公开日期 | 2015-08-18 |
| 源URL | [http://119.78.226.72/handle/331011/18343]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England 2.European So Observ, D-85748 Garching, Germany 3.Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland 4.Univ Oxford, Dept Phys, Subdept Astrophys, Oxford OX1 3RH, England 5.Univ Cambridge, Kavli Inst Cosmol, Cambridge CB3 0HA, England 6.Univ Cambridge, Cavendish Lab, Cambridge CB3 0HA, England 7.Univ Wisconsin, Dept Astron, Madison, WI 53706 USA 8.NYU, Dept Phys, Ctr Cosmol & Particle Phys, New York, NY 10003 USA 9.Univ Tokyo, Todai Inst Adv Study, Kavli Inst Phys & Math Universe, Kashiwa, Chiba 2778583, Japan 10.Yale Univ, Yale Ctr Astron & Astrophys, New Haven, CT 06520 USA |
| 推荐引用方式 GB/T 7714 | Wilkinson, David M.,Maraston, Claudia,Thomas, Daniel,et al. P-MaNGA: full spectral fitting and stellar population maps from prototype observations[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2015,449(1):328-360. |
| APA | Wilkinson, David M..,Maraston, Claudia.,Thomas, Daniel.,Coccato, Lodovico.,Tojeiro, Rita.,...&Simmons, Audrey.(2015).P-MaNGA: full spectral fitting and stellar population maps from prototype observations.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,449(1),328-360. |
| MLA | Wilkinson, David M.,et al."P-MaNGA: full spectral fitting and stellar population maps from prototype observations".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 449.1(2015):328-360. |
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来源：上海天文台
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