Blue straggler formation via close binary mass transfer
文献类型：期刊论文
| 作者 | Lu, P.1,2; Deng, L. C.1; Zhang, X. B.1 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2010-12-11 |
| 卷号 | 409期号:3页码:1013-1021 |
| 关键词 | blue stragglers galaxies: star clusters: individual: M67 |
| 英文摘要 | Several mechanisms of blue straggler (BS) formation via mass transfer in close binaries are studied in this work. Detailed close binary evolutionary models including both Cases A and B are calculated. We follow the evolution of a binary of 1.4 M-circle dot + 0.9 M-circle dot and compare the evolutionary behaviour of both cases. The results show that Case B is as important as Case A in forming BSs. Moreover, BSs formed via Case B are generally bluer and even more luminous than those produced by Case A, which provides a clue as to the origin of luminous BSs - such as those in M67. Based on the models calculated at 4.0 Gyr of age, a Monte Carlo simulation of the BS population in M67 is carried out using both Case A and Case B scenarios. Five BSs formed via mass transfer were predicted by our simulation and another three by dynamical merger processes. The simulation uses an artificially enlarged sample size for better statistics. The contributions from the different channels are estimated. We also investigate the influence of mass transfer efficiency beta during Roche lobe overflow on close binary evolution. The result shows that a high value of beta could reproduce the observed data better. The mechanism discussed in this work cannot predict all observed BSs in M67 because many factors are involved in such an old open cluster that affect the formation of BSs. However, we offer a better explanation of blue and luminous BSs in the binary evolution channel. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000284854300010 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8073]  |
| 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, Key Lab Opt Astron, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lu, P.,Deng, L. C.,Zhang, X. B.. Blue straggler formation via close binary mass transfer[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2010,409(3):1013-1021. |
| APA | Lu, P.,Deng, L. C.,&Zhang, X. B..(2010).Blue straggler formation via close binary mass transfer.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,409(3),1013-1021. |
| MLA | Lu, P.,et al."Blue straggler formation via close binary mass transfer".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 409.3(2010):1013-1021. |
入库方式： OAI收割
来源：国家天文台
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