Speaker
Description
Primordial black holes (PBHs) are black holes generated in the early universe without experience of the form of a star. It has been pointed out that PBHs may be candidates for black holes and compact objects of various masses in the universe or a major component of dark matter. In particular, PBHs have been attracting much attention in the recent development of gravitational wave observation. In the standard formation process, PBHs are formed from super-horizon primordial fluctuations with non-linearly large initial amplitude. In order to follow the whole non-linear gravitational dynamics, one has to rely on numerical relativity to solve Einstein equations. COSMOS and COSMOS-S are open C++ packages for solving Einstein equations in 3+1 dimensions and spherical symmetry (1+1 dimensions), respectively, specialized for PBH formation.
