A monte-carlo method for estimating stellar photometric metallicity distributions
文献类型：期刊论文
| 作者 | Gu, Jiayin1; Du, Cuihua2; Jing, Yingjie2; Zuo, Wenbo2 |
| 刊名 | Astrophysical journal
 |
| 出版日期 | 2016-07-20 |
| 卷号 | 826期号:1页码:6 |
| 关键词 | Galaxy: halo Methods: data analysis Stars: fundamental parameters Stars: statistics |
| ISSN号 | 0004-637X |
| DOI | 10.3847/0004-637x/826/1/36 |
| 通讯作者 | Gu, jiayin(gujiayin12@mails.ucas.ac.cn) |
| 英文摘要 | Based on the sloan digital sky survey, we develop a new monte-carlo-based method to estimate the photometric metallicity distribution function (mdf) for stars in the milky way. compared with other photometric calibration methods, this method enables a more reliable determination of the mdf, particularly at the metal-poor and metal-rich ends. we present a comparison of our new method with a previous polynomial-based approach and demonstrate its superiority. as an example, we apply this method to main-sequence stars with 0.2 < g-r < 0.6, 6 kpc < r < 9 kpc, and in different intervals in height above the plane, vertical bar z vertical bar. the mdfs for the selected stars within two relatively local intervals (0.8 kpc < vertical bar z vertical bar < 1.2 kpc, 1.5 kpc < vertical bar z vertical bar < 2.5 kpc) can be well-fit by two gaussians with peaks at [fe/h] approximate to -0.6 and -1.2, respectively: one associated with the disk system and the other with the halo. the mdfs for the selected stars within two more distant intervals (3 kpc < vertical bar z vertical bar < 5 kpc, 6 kpc < vertical bar z vertical bar < 9 kpc) can be decomposed into three gaussians with peaks at [fe/h] approximate to -0.6, -1.4, and -1.9, respectively, where the two lower peaks may provide evidence for a two-component model of the halo: the inner halo and the outer halo. the number ratio between the disk component and halo component(s) decreases with vertical distance from the galactic plane, which is consistent with the previous literature. |
| WOS关键词 | DIGITAL SKY SURVEY ; MILKY-WAY TOMOGRAPHY ; SOUTH GALACTIC CAP ; DATA RELEASE ; INTERMEDIATE-LATITUDE ; OPEN CLUSTERS ; SDSS ; STARS ; CALIBRATION ; SCUSS |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000381962200036 |
| 出版者 | IOP PUBLISHING LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2374418 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Gu, Jiayin |
| 作者单位 | 1.Wuhan Univ Technol, Dept Phys, Wuhan 430000, Peoples R China 2.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gu, Jiayin,Du, Cuihua,Jing, Yingjie,et al. A monte-carlo method for estimating stellar photometric metallicity distributions[J]. Astrophysical journal,2016,826(1):6. |
| APA | Gu, Jiayin,Du, Cuihua,Jing, Yingjie,&Zuo, Wenbo.(2016).A monte-carlo method for estimating stellar photometric metallicity distributions.Astrophysical journal,826(1),6. |
| MLA | Gu, Jiayin,et al."A monte-carlo method for estimating stellar photometric metallicity distributions".Astrophysical journal 826.1(2016):6. |
入库方式： iSwitch采集
来源：中国科学院大学
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。