今天是   收藏本站 | 联系我们 | 上海天文台 | English
首页 研究领域 研究团组 科研人员 学术活动 工作机会 内部信息
The formation and dynamical evolution of free-floating planets in star clusters

Speaker: Thijs Kouwenhoven (KIAA/PKU)

Time: Thursday, 3:00pm, November 28th

Location: Lecture Hall, 3rd floor

 

Abstract: The recent discovery of a large population of exoplanets in the Galactic field has provided a wealth of information that helps us understand how planetary systems form and evolve. Exoplanet surveys targeting star clusters, on the other hand, have been less successful: only a hand full of exoplanets have been discovered in these regions. This may be attributed to the frequent encounters experienced by star cluster members, and possibly by a difference in the formation process. The presence of multiple planets in a system (such as our own Solar system) can substantially increase the possibility of planet ejections, which may explain the absence of close-in planets, such as hot Jupiters, that would normally be unaffected by stellar encounters. This talk focuses on the dynamical fate of multi-planet systems in dense stellar systems and on the evolution of the free-floating planet population in star clusters resulting from destabilized planetary systems. Since most of the planet-hosting stars in the Galactic field (and probably even our own solar system) are thought to have formed in clustered stellar environments, this places limits on the properties of the star clusters they may have formed in.

 

Biog: Thijs graduated from the University of Amsterdam in 2006, after which he moved to Sheffield as a postdoc before taking up his current position as Bairen Research Professor at KIAA in Beijing. In 2009 he was awarded the prestigious IAU Gruber Foundation Fellowship.

 

共2页 1 2 下一页 尾页
©2008-2013 中国科学院上海天文台 版权所有
地址:上海市南丹路80号 邮编:200030 邮件:shao@shao.ac.cn