117 citations · 1k across the 40 of their papers we have counts for
3 papers · 2 filters
DeWitt boundary condition is consistent in Hořava-Lifshitz quantum gravity
Hiroki Matsui, Shinji Mukohyama, Atsushi Naruko
In quantum cosmology the DeWitt boundary condition is a proposal to set the wave function of the universe to vanish at the classical big-bang singularity. In this Letter, we show t…
Testing the Non-circularity of the Spacetime around Sagittarius A* with Orbiting Pulsars
Yohsuke Takamori, Atsushi Naruko, Yusuke Sakurai +3
A disformal Kerr black hole solution is a rotating black hole solution in a modified gravity theory which breaks the circular condition of spacetime differently from the case of th…
Backreaction of Mass and Angular Momentum Accretion on Black Holes: General Formulation of the Metric Perturbations and Application to the Blandford-Znajek Process
Masashi Kimura, Tomohiro Harada, Atsushi Naruko +1
We study the metric backreaction of mass and angular momentum accretion on black holes. We first develop the formalism of monopole and dipole linear gravitational perturbations aro…