报告人：Maria Messineo (Max Planck Institute fuer Radioastronomy)

时间：2015年7月4日下午4：00

地点：东区理化大楼18层天文台报告厅

报告摘要：Massive stars are mostly found in massive clusters and in proximity of giant HII regions. Thereby, young massive stellar clusters are natural laboratories for studying stellar evolution, and for mapping large scale structures of the Milky Way. Available new photometric data from large infrared surveys of the Galactic plane (e.g. 2MASS, DENIS, UKIDSS, VISTA, MSX, WISE, and GLIMPSE) allow us to search for candidate stellar clusters (with more than 2800 new candidates). However, the number and spatial distributions of clusters in the Inner Milky Way are still quite uncertain due to our poor knowledge on distances and dust extinction. I will present a small review on the current census of massive clusters, along with a few examples of clusters we have analyzed. We have conducted an infrared spectroscopic survey for massive evolved stars and clusters in the Galactic giant molecular clouds G23.3-0.3 and W33. A large number of extraordinary sub-clumps/clusters of massive stars were detected. Their spatial and temporal distribution yields information on the star formation history of these clouds.