Effect of binary fraction on horizontal branch morphology under tidally enhanced stellar wind
文献类型：期刊论文
| 作者 | Lei, ZX1,2 ; Cheng, XM3; Kang XY(康晓宇)2,4; Zhang FH(张奉辉)2,4; Han ZW(韩占文)2,4
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| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
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| 出版日期 | 2014-08 |
| 卷号 | 66期号:4 |
| 关键词 | binaries: general globular clusters: general stars: horizontal-branch |
| ISSN号 | 0004-6264 |
| 产权排序 | 第四完成单位 |
| 通讯作者 | Lei, ZX (reprint author), Shaoyang Univ, Dept Sci, Shaoyang 422000, Peoples R China. |
| 英文摘要 | Tidally enhanced stellar wind may affect horizontal branch (HB) morphology in globular clusters (GCs) by enhancing the mass loss of primary star during binary evolution. Lei et al. (2013a, A&A, 549, 145; 2013b, A&A, 554, 130) studied the effect of this kind of wind on HB morphology in detail, and their results indicated that a binary is a possible second-parameter (2P) candidate in GCs. Binary fraction is a very important fact in the tidally-enhanced-stellar-wind model. In this paper, we studied the effect of binary fraction on HB morphology by removing the effects of metallicity and age. Five different binary fractions (i.e., 10%, 15%, 20%, 30%, and 50%) are adopted in our model calculations. The synthetic HB morphologies with different binary fractions are obtained at different metallicities and ages. We found that, due to the great influence of metallicity and age, the effect of binary fraction on HB morphology may be masked by these two parameters. However, when the effects of metallicity and age are removed, the tendency of HB morphologies becoming bluer with increasing binary fractions is clearly presented. Furthermore, we compared our results with the observation by Milone et al. (2012, A&A, 540, 16). Our results are consistent with the observation at metal-rich and metal-poor GCs. For the GCs with intermediate metallicity, when the effect of age on HB morphology is removed, a weak tendency of HB morphologies becoming bluer with increasing binary fractions is presented in all regions of GCs, which is consistent with our results obtained in this metallicity range. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | COLOR-MAGNITUDE DIAGRAM ; GLOBULAR-CLUSTERS ; 2ND PARAMETER ; EVOLUTIONARY SYNTHESIS ; MULTIPLE POPULATIONS ; RELATIVE AGES ; MAIN-SEQUENCE ; ACS SURVEY ; NGC 2808 ; STARS |
| 收录类别 | SCI |
| 原文出处 | http://pasj.oxfordjournals.org/content/66/4/82 |
| 语种 | 英语 |
| WOS记录号 | WOS:000342233900017 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4574]  |
| 专题 | 云南天文台_大样本恒星演化研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.Department of Science, Shaoyang University, Shaoyang 422000, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China 3.Department of Electrical Engeering, Shaoyang University, Shaoyang 422000, China 4.Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China |
| 推荐引用方式 GB/T 7714 | Lei, ZX,Cheng, XM,Kang XY,et al. Effect of binary fraction on horizontal branch morphology under tidally enhanced stellar wind[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2014,66(4). |
| APA | Lei, ZX,Cheng, XM,Kang XY,Zhang FH,&Han ZW.(2014).Effect of binary fraction on horizontal branch morphology under tidally enhanced stellar wind.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,66(4). |
| MLA | Lei, ZX,et al."Effect of binary fraction on horizontal branch morphology under tidally enhanced stellar wind".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 66.4(2014). |
入库方式： OAI收割
来源：云南天文台
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