题  目：Infrared Properties of Interacting Galaxies: from Spirals to ULIRGs

报告人：Dr. Vassilis Charmandaris
　　　　　 (University of Crete, Greece)

摘  要: Interactions between galaxies lead to massive star formation over extended spatial scales where the properties of interstellar radiation field, gas and dust content vary substantially. Interactions were more frequent in the past and it the principal mechanism of galaxy evolution, often leading to the formation of ultraluminous infrared systems (ULIRGs). While rare in the local Universe, ULIRGs play a dominant role in producing the far-infrared background as well as the star formation energy density at high redshifts. I will review the mid infrared properties of interacting galaxies as these were revealed using observations from the Spitzer Space Telescope. An emphasis will be given to the use of variations in the infrared spectral energy distributions as a tracer of the physical mechanism dominating the energy production in these systems.

时  间：2010年10月19日（星期二）上午10:30

地  点：（北京西路2号）紫台大楼327教室

　　　　　　　　　　　　　　　　　　 紫金山天文台学术委员会学术交流工作委员会
　　　　　　　　　　　　　　　　　　　　　　　　　　　　  2010年10月12日