报告题目：Formation of the Planetary Candidates Observed by Kepler Mission

　　摘    要：The Kepler Mission, launched in 2009 March, photometrically monitors a large patch of sky with sufficient precision to detect terrestrial-sized planets in potentially habitable orbits. To date the Kepler mission has released more than 4230 planetary candidates. There are plenty of planet pairs are trapped near the first order mean motion resonance. We propose a formation scenario for the planetary configurations near 3:2 and 2:1 MMRs. Firstly, the low-mass planets form at a distant region rather than at their present locations; then they will undergo type I migration until they reach the inner region of the gaseous disk and stop migrating. Subsequently, tidal interactions between the planets and the central star will circularize their resultant orbits. From the statistical results, we find that under the formation scenario, the proportions near 1.5 and 2.0 can reach 14.5% and 26.0%, respectively. This formation scenario will provide a likely explanation for Kepler candidates involved in 2:1 and 3:2 MMRs.

　　时间及地点：4月1日（周三）下午2:30，天文楼202会议室 

欢迎各位老师、同学参加！

                                             南京大学天文与空间科学学院