The Stellar Metallicity Distribution of the Galactic Halo Based on SCUSS and SDSS Data
文献类型：期刊论文
| 作者 | Zuo, Wenbo1; Du, Cuihua1,2; Jing, Yingjie3; Gu, Jiayin4; Newberg, Heidi Jo2; Wu, Zhenyu5,6 ; Ma, Jun5,6; Zhou, Xu5; Zhou,Xu; Ma,Jun
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2017-05-20 |
| 卷号 | 841期号:1 |
| 关键词 | Galaxy: abundances Galaxy: halo Galaxy: kinematics and dynamics |
| 英文摘要 | Based on the Sloan Digital Sky Survey and South Galactic Cap u-band Sky Survey (SCUSS), we simulate the photometric metallicity distribution functions (MDFs) of stars in the Galactic halo. The photometric metallicity of stars was estimated by a new Monte-Carlo method. Due to the use of a more reliable metallicity calibration method and more accurate u-band deep measurements from SCUSS, we can obtain more accurate MDFs of a large sample of distant stars in the Galactic halo. In this study, we select 78,092 F/G main-sequence turnoff stars (MSTO) in the. south Galactic cap, with 0.2. < (g- r)(0) < 0.4, as tracers of the stellar MDFs in the Galactic halo. The sample stars are divided into two height intervals above the Galactic plane: -8 < z < -4 kpc and -12 < z < -8 kpc. The MDFs of selected stars in each interval are well fit by a three-Gaussian model, with peaks at [Fe/H] approximate to -0.63, -1.45, and -2.0. The two metal-poor components correspond to the inner halo and outer halo, respectively. The fraction of the metal-rich component, which may be contributed by the substructure (such as Sagittarius stream or other streams) is about 10%. With limited kinematic estimation, we find the correlations between metallicity and kinematics. Our results provide. additional supporting evidence of duality of the Galactic halo. |
| 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 ; MILKY-WAY TOMOGRAPHY ; METAL-POOR STARS ; INTERMEDIATE-LATITUDE ; SPECTROSCOPIC SURVEY ; ABUNDANCE RATIOS ; OPEN CLUSTERS ; DATA RELEASE ; SEGUE ; SAGITTARIUS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000402310500045 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8794]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 2.Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA 3.Chinese Acad Sci, Key Lab Computat Astrophys, Natl Astron Observ, Beijing 100012, Peoples R China 4.Wuhan Univ Technol, Dept Phys, Wuhan 430000, Peoples R China 5.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China 6.Univ Chinese Acad Sci, Coll Astron & Space Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zuo, Wenbo,Du, Cuihua,Jing, Yingjie,et al. The Stellar Metallicity Distribution of the Galactic Halo Based on SCUSS and SDSS Data[J]. ASTROPHYSICAL JOURNAL,2017,841(1). |
| APA | Zuo, Wenbo.,Du, Cuihua.,Jing, Yingjie.,Gu, Jiayin.,Newberg, Heidi Jo.,...&Wu,Zhenyu.(2017).The Stellar Metallicity Distribution of the Galactic Halo Based on SCUSS and SDSS Data.ASTROPHYSICAL JOURNAL,841(1). |
| MLA | Zuo, Wenbo,et al."The Stellar Metallicity Distribution of the Galactic Halo Based on SCUSS and SDSS Data".ASTROPHYSICAL JOURNAL 841.1(2017). |
入库方式： OAI收割
来源：国家天文台
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。