BATC 15 BAND PHOTOMETRY OF THE OPEN CLUSTER NGC 188
文献类型：期刊论文
| 作者 | Wang, Jiaxin1,2 ; Ma, Jun1; Wu, Zhenyu1; Wang, Song1; Zhou, Xu1
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| 刊名 | ASTRONOMICAL JOURNAL
 |
| 出版日期 | 2015-08-01 |
| 卷号 | 150期号:2 |
| 关键词 | open clusters and associations: individual (NGC 188) stars: fundamental parameters stars: luminosity function mass function |
| 英文摘要 | This paper presents CCD multicolor photometry for the old open cluster NGC 188. The observations were carried out as part of the Beijing-Arizona-Taiwan-Connecticut Multicolor Sky Survey from 1995 February to 2008 March, using 15 intermediate-band filters covering 3000-10000 angstrom. By fitting the Padova theoretical isochrones to our data, the fundamental parameters of this cluster are derived: an age of t = 7.5 +/- 0.5 Gyr, a distance modulus of (m-M)(0) = 11.17 +/- 0.08, and a reddening of E (B-V) = 0.036 +/- 0.010. The radial surface density profile of NGC 188 is obtained using the star count. By fitting the King model, the structural parameters of NGC 188 are derived: a core radius of R-c = 3'.80, a tidal radius of R-t = 44'.78, and a concentration parameter of C-0 = log(R-t/R-c)= 1.07. Fitting the mass function (MF) to a power-law function phi(m) proportional to m(alpha), the slopes of the MFs for different spatial regions are derived. We find that NGC 188 presents a slope break in the MF. The break mass is m(break) = 0.885 M-circle dot. In the mass range above m(break), the slope of the overall region is alpha = -0.76. The slope of the core region is alpha = 1.09, and the slopes of the external regions are alpha = -0.86 and alpha = -2.15, respectively. In the mass range below m(break), these slopes are alpha = 0.12, alpha = 4.91, alpha = 1.33, and alpha = -1.09, respectively. The mass segregation in NGC 188 is reflected in the obvious variation of the slopes in different spatial regions of this cluster. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000358856900022 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5647]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Beijing 10039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Jiaxin,Ma, Jun,Wu, Zhenyu,et al. BATC 15 BAND PHOTOMETRY OF THE OPEN CLUSTER NGC 188[J]. ASTRONOMICAL JOURNAL,2015,150(2). |
| APA | Wang, Jiaxin,Ma, Jun,Wu, Zhenyu,Wang, Song,&Zhou, Xu.(2015).BATC 15 BAND PHOTOMETRY OF THE OPEN CLUSTER NGC 188.ASTRONOMICAL JOURNAL,150(2). |
| MLA | Wang, Jiaxin,et al."BATC 15 BAND PHOTOMETRY OF THE OPEN CLUSTER NGC 188".ASTRONOMICAL JOURNAL 150.2(2015). |
入库方式： OAI收割
来源：国家天文台
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