报告题目: Searching IR excess stars and observation of debris disks 

　　报告人：武朝剑 (副研究员, 国家天文台) 

　　报告摘要：A debris disk, generally created by collision of planetesimals, is a circumstellar disk of dust grains or debris around a star. Debris disks supply a reservoir of material from which planets may form.Most of knowledges about debris disks are based on indirect measurements (e.g., SEDs of infrared excess stars), but in the past decade, well-resolved direct images of debris disks have become available and can provide us with important information on the structure of the disks and how they are affected by their ambient environment. In this talk, I will report how to search infrared excess stars and discuss the observations of debris disks with AO and coronagraph. 

　　报告时间：2017年4月28日（星期五）上午9:30 

　　报告地点：南京天光所办公大楼二楼报告厅 

All are welcome! 

　                                           南京天文光学技术研究所学术委员会