Formation of S-type planets in close binaries: scattering-induced tidal capture of circumbinary planets
文献类型:期刊论文
作者 | Gong, Yan-Xiang1,2; Ji, Jianghui1 |
刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
出版日期 | 2018-08-01 |
卷号 | 478期号:4页码:4565-4574 |
ISSN号 | 0035-8711 |
关键词 | celestial mechanics binaries: close planetary systems |
DOI | 10.1093/mnras/sty1300 |
英文摘要 | Although several S-type and P-type planets in binary systems were discovered in past years, S-type planets have not yet been found in close binaries with an orbital separation not more than 5 au. Recent studies suggest that S-type planets in close binaries may be detected through high-accuracy observations. However, nowadays planet formation theories imply that it is difficult for S-type planets in close binaries systems to form in situ. In this work, we extensively perform numerical simulations to explore scenarios of planet-planet scattering among circumbinary planets and subsequent tidal capture in various binary configurations, to examine whether the mechanism can play a part in producing such kind of planets. Our results show that this mechanism is robust. The maximum capture probability is similar to 10 per cent, which can be comparable to the tidal capture probability of hot Jupiters in single star systems. The capture probability is related to binary configurations, where a smaller eccentricity or a low mass ratio of the binary will lead to a larger probability of capture, and vice versa. Furthermore, we find that S-type planets with retrograde orbits can be naturally produced via capture process. These planets on retrograde orbits can help us distinguish in situ formation and post-capture origin for S-type planet in close binaries systems. The forthcoming missions (PLATO) will provide the opportunity and feasibility to detect such planets. Our work provides several suggestions for selecting target binaries in search for S-type planets in the near future. |
WOS关键词 | HIGHLY ECCENTRIC ORBITS ; EXTRASOLAR PLANETS ; ECLIPSING BINARIES ; GIANT PLANETS ; SYSTEMS ; EVOLUTION ; CIRCULARIZATION ; EXOPLANETS ; ACCRETION ; MIGRATION |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | OXFORD UNIV PRESS |
WOS记录号 | WOS:000441288300019 |
源URL | [http://libir.pmo.ac.cn/handle/332002/21758] |
专题 | 中国科学院紫金山天文台 |
通讯作者 | Gong, Yan-Xiang; Ji, Jianghui |
作者单位 | 1.Chinese Acad Sci, CAS Key Lab Planetary Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 2.Taishan Univ, Coll Phys & Elect Engn, Tai An 271000, Shandong, Peoples R China |
推荐引用方式 GB/T 7714 | Gong, Yan-Xiang,Ji, Jianghui. Formation of S-type planets in close binaries: scattering-induced tidal capture of circumbinary planets[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,478(4):4565-4574. |
APA | Gong, Yan-Xiang,&Ji, Jianghui.(2018).Formation of S-type planets in close binaries: scattering-induced tidal capture of circumbinary planets.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,478(4),4565-4574. |
MLA | Gong, Yan-Xiang,et al."Formation of S-type planets in close binaries: scattering-induced tidal capture of circumbinary planets".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 478.4(2018):4565-4574. |
入库方式: OAI收割
来源:紫金山天文台
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