4 papers
Destruction of the central black hole gas reservoir through head-on galaxy collisions
Yohei Miki, Masao Mori, Toshihiro Kawaguchi
A massive black hole exists in almost every galaxy. They occasionally radiate a vast amount of light by releasing gravitational energy of accreting gas, with a cumulative active pe…
Cusp-to-core transition in low-mass dwarf galaxies induced by dynamical heating of cold dark matter by primordial black holes
Pierre Boldrini, Yohei Miki, Alexander Y. Wagner +3
We performed a series of high-resolution -body simulations to examine whether dark matter candidates in the form of primordial black holes (PBHs) can solve the cusp-core problem…
Gravitational octree code performance evaluation on Volta GPU
Yohei Miki
In this study, the gravitational octree code originally optimized for the Fermi, Kepler, and Maxwell GPU architectures is adapted to the Volta architecture. The Volta architecture…
The nature of the progenitor of the M31 North-western stream: globular clusters as milestones of its orbit
Takanobu Kirihara, Yohei Miki, Masao Mori
We examine the nature, possible orbits and physical properties of the progenitor of the North-western stellar stream (NWS) in the halo of the Andromeda galaxy (M31). The progenitor…