Photometric metallicity calibration with SDSS and SCUSS and its application to distant stars in the south Galactic cap
文献类型：期刊论文
| 作者 | Gu, Jiayin1; Du, Cuihua1; Jia, Yunpeng2 ; Peng, Xiyan2; Wu, Zhenyu2; Jing, Yingjie2; Ma, Jun2; Zhou, Xu2; Fan, Xiaohui3,4; Fan, Zhou2
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2015-09-21 |
| 卷号 | 452期号:3页码:3092-3099 |
| 关键词 | Galaxy: abundances Galaxy: formation Galaxy: halo Galaxy: stellar content Galaxy: structure |
| 英文摘要 | Based on Sloan Digital Sky Survey (SDSS) g, r and South Galactic Cap of u-band Sky Survey (SCUSS) u photometry, we develop a photometric calibration for estimating the stellar metallicity from u - g and g - r colours by using the SDSS spectra of 32 542 F-and G-type main-sequence stars, which cover almost 3700 deg(2) in the south Galactic cap. The rms scatter of the photometric metallicity residuals relative to spectrum-based metallicity is 0.14 dex when g - r < 0.4, and 0.16 dex when g - r > 0.4. Because of the deeper and more accurate magnitude of SCUSS u band, the estimate can be used up to the faint magnitude of g = 21. This application range of photometric metallicity calibration is wide enough so that it can be used to study metallicity distribution of distant stars. In this study, we select the Sagittarius (Sgr) stream and its neighbouring field halo stars in south Galactic cap to study their metallicity distribution. We find that the Sgr stream at the cylindrical Galactocentric coordinate of R similar to 19 kpc, vertical bar z vertical bar similar to 14 kpc exhibits a relative rich metallicity distribution, and the neighbouring field halo stars in our studied fields can be modelled by two-Gaussian model, with peaks, respectively, at [Fe/H] = -1.9 and -1.5. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000360854200066 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5589]  |
| 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.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 3.Univ Arizona, Dept Astron, Tucson, AZ 85721 USA 4.Univ Arizona, Steward Observ, Tucson, AZ 85721 USA 5.Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China 6.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gu, Jiayin,Du, Cuihua,Jia, Yunpeng,et al. Photometric metallicity calibration with SDSS and SCUSS and its application to distant stars in the south Galactic cap[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2015,452(3):3092-3099. |
| APA | Gu, Jiayin.,Du, Cuihua.,Jia, Yunpeng.,Peng, Xiyan.,Wu, Zhenyu.,...&Zhou, Zhimin.(2015).Photometric metallicity calibration with SDSS and SCUSS and its application to distant stars in the south Galactic cap.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,452(3),3092-3099. |
| MLA | Gu, Jiayin,et al."Photometric metallicity calibration with SDSS and SCUSS and its application to distant stars in the south Galactic cap".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 452.3(2015):3092-3099. |
入库方式： OAI收割
来源：国家天文台
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