题　  目: A cosmic-ray-dominated ISM in starbursts: New Initial conditions for star formation in the Universe

报 告 人：Padelis P. Papadopoulos, 德国马普射电天文所

摘　  要: I will present the thermal, dynamical, and ionization state of the gas regions where the initial conditions of star formation (SF) are set in galaxies. Then I will show how these are dramatically altered by the large CR energy densities expected in merger/starbursts, amounting to a physical, extinction-free, star-formation feedback mechanism. This powerful feedback, by altering the SF initial conditions also alters the gravitational fragmentation properties of dense H2 clouds, leading to a top-heavy stellar Initial Mass Function (IMF). The latter is of tremendous importance for cosmological structure formation.

报告时间：2012年8月29日（星期三）下午3点

报告地点：苏富特大厦一楼会议室

非常欢迎大家参加！

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