演講資訊

摘要：

We have performed present 4 square degree weak gravitational lensing survey of subhalos in the nearby Coma cluster using Subaru/Suprime-Cam and detected 32 subhalos down to the order of 10^-3 of the virial mass of the cluster. We constrcted the subhalo mass function in the range of two orders of magnitude in mass by weak-lensing mass measurement of shear-selected subhalos. The obtained mass function is well described by a single power law, and best-fit power indice is consistent with the prediction by the cold dark matter paradigm. In this talk I will give a brief introduction of weak lensing.