题目：The Kinetic Temperature in The Galactic Center Region

　　报告人：Dr. Christian HENKEL(Max Planck Institut für Radioastronomie(MPIfR))

　　摘要：The Galactic Center is the closest region in which we can study star formation under extreme physical conditions like those sometimes encountered in high-redshift galaxies. We have mapped the inner 300 pc of the Central Molecular Zone (CMZ) in temperature sensitive molecular tracers to determine what is driving the heating and to find out in what way these tracers are themselves dependent on environmental conditions.

　　Maps of kinetic temperature are presented and compared with those of the dust. Potential heating mechanisms, like mechanical heating, UV irradiation (Photon Dominated Regions, PDRs), X-ray irradiation (X-ray Dominated Regions, XDRs), and cosmic ray irradiation (Cosmic Ray Dominated Regions, CRDRs) are introduced and a most likely scenario is identified. As an addendum, recently found new maser lines are also addressed.

　　时间：2016年5月24日（星期二）10:00

　　地点：（北京西路2号）紫台大楼619教室

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　　                                                紫金山天文台学术委员会