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Since the discovery of the first exoplanet (51 Peg b) orbiting a solar star in 1995, the study of exoplanets has been one of the most active frontiers. To date, over 5000 exoplanets have been discovered and thousands of candidates are yet to be confirmed. The map of known exoplanets has expanded significantly from the solar neighborhood (100-200 pc) to a much larger area (orders of 1000 pc) in the Galaxy thanks to the improvement of observational technology. We are therefore entering a new era of exoplanet census in the Milky Way Galaxy. In the Galactic context, one of fundamental questions in studying exoplanets is: what are the differences in the properties of planetary systems at different positions in the Galaxy with different ages? The answer to this question will provide insights on the formation and evolution of the ubiquitous and diverse exoplanets in different Galactic environments. In this talk, I will introduce our recent work aiming to address this question, which has been aided by the LAMOST, Gaia and Kepler surveys.
Ji-Wei XIE was born in 1984 and received his bachelor’s degree from the Department of Astronomy at Nanjing University in 2006. He was a PhD student jointly hosted by Nanjing University and University of Florida. He obtained his PhD in 2011, then worked as a post-doc researcher at University of Toronto from 2011 to 2013. Since 2014, he worked as an associate professor and was promoted to Professor in 2020 at the School of Astronomy and Space Science, Nanjing University. He has been engaged in the theoretical and observational research of exoplanets. Recently, his research focuses on statistical studies of large samples of exoplanets, aiming to deepen our understanding of the diversity, formation and evolution of planetary systems.
Place: N630
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