报告题目：Snow and the Seven Thousand White Dwarfs

报 告 人：Jeremy Heyl (University of British Columbia)

报告时间：2016年10月27日10：30-11：30

报告地点：蒙民伟科技南楼S727

报告摘要：Using the Hubble Space Telescope our group has built an unprecedented sample of nearly seven thousand white dwarfs in the globular cluster 47 Tucanae.I will describe how we use these white dwarfs to measure dynamical relaxation in the core of the cluster, constrain the epoch of mass loss in the post-main sequence evolution of solar-like stars, probe the cross-section of neutrinos in the keV regime, constrain the properties of the axion and maybe even see stars snowing.