The metallicity distribution of F/G dwarfs derived from BATC survey data
文献类型：期刊论文
| 作者 | Chen, ABC; Jiang, ZJ; Chen, JS; Zhou, X ; Ma, J; Shi, JR; Du, CH
|
| 刊名 | ASTRONOMICAL JOURNAL
 |
| 出版日期 | 2004-11-01 |
| 卷号 | 128期号:5页码:2265-2273 |
| 关键词 | Galaxy : Abundances Galaxy : Disk Galaxy : Formation Galaxy : Halo Galaxy : Structure |
| 英文摘要 | Based on synthetic flux spectra calculated from theoretical atmospheric models, a calibration of temperature and metallicity for the dwarfs observed in the Beijing-Arizona-Taiwan-Connecticut multicolor photometric system is presented in this paper. According to this calibration, stellar effective temperatures can be obtained from some temperature-sensitive color indexes. The sample stars have colors and magnitudes in the ranges 0.1 < d - i < 0.9 and 14.0 < i < 20.5. The photometric metallicities for these sample stars can be derived by fitting SEDs. We determine the average stellar metallicity as a function of distance from the Galactic plane. The metallicity gradient is found to be d[Fe/H]/dz = -0.37 +/- 0.1 dex kpc(-1) for z < 4 kpc and d[Fe/H]/dz = -0.06 +/- 0.09 dex kpc(-1) between 5 and 15 kpc. These results can be explained in terms of different contributions in density distribution for Galactic model "thin disk,'' "thick disk,'' and "halo'' components. However, for the gradient in z > 5 kpc, it could not be interpreted according to the different contributions from the three components because of the large uncertainty. So it is possible that there is little or no gradient for z > 5 kpc. The overall distribution shows a metallicity gradient d[Fe/H]/dz = -0.17 +/- 0.04 dex kpc(-1) for z < 15 kpc. |
| 语种 | 英语 |
| WOS记录号 | WOS:000224866500020 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8920]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Grad Sch, Coll Phys Sci, Beijing 100012, Peoples R China 3.Natl Cheng Kung Univ, Dept Phys, Taipei 70148, Taiwan |
| 推荐引用方式 GB/T 7714 | Chen, ABC,Jiang, ZJ,Chen, JS,et al. The metallicity distribution of F/G dwarfs derived from BATC survey data[J]. ASTRONOMICAL JOURNAL,2004,128(5):2265-2273. |
| APA | Chen, ABC.,Jiang, ZJ.,Chen, JS.,Zhou, X.,Ma, J.,...&Du, CH.(2004).The metallicity distribution of F/G dwarfs derived from BATC survey data.ASTRONOMICAL JOURNAL,128(5),2265-2273. |
| MLA | Chen, ABC,et al."The metallicity distribution of F/G dwarfs derived from BATC survey data".ASTRONOMICAL JOURNAL 128.5(2004):2265-2273. |
入库方式： OAI收割
来源：国家天文台
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