明天（十月十三日）晚上7点，于理化大楼19楼报告厅，将进行本学期的第三次Journal Club。这次Journal Club，来自蔡一夫教授课题组的陈超同学将带来“Primordial black hole formation and constraints”的报告。欢迎大家参加！

报告简介：Primordial black holes (PBHs) may be formed via gravitational collapse of primordial density perturbations in the early Universe.  In this talk, I'll describe the physical picture of PBH formation, and also talk about their constraints briefly. Welcome to join! Thank you!