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6 papers · 2 filters
Naked Singularity Explosion in Higher Dimensions
Umpei Miyamoto, Hiroya Nemoto, Masahiro Shimano
Motivated by the recent argument that in the TeV-scale gravity trans-Planckian domains of spacetime as effective naked singularities would be generated by high-energy particle (and…
Collision of an object in the transition from adiabatic inspiral to plunge around a Kerr black hole
Tomohiro Harada, Masashi Kimura
An inspiralling object of mass around a Kerr black hole of mass experiences a continuous transition near the innermost stable circular orbit from adiabatic inspiral…
A trapped surface in the higher-dimensional self-similar Vaidya spacetime
Masahiro Shimano, Tomohiro Harada, Naoki Tsukamoto
We investigate a trapped surface and naked singularity in a -dimensional Vaidya spacetime with a self-similar mass function. A trapped surface is defined as a closed spacelike $…
Weak cosmic censorship in gravitational collapse with astrophysical parameter values
Umpei Miyamoto, Sanjay Jhingan, Tomohiro Harada
The possible violation of the weak cosmic censorship hypothesis in astrophysical phenomena can provide us with the information about trans-Planckian physics through observations. W…
Dynamic black holes through gravitational collapse: Analysis of multipole moment of the curvatures on the horizon
Motoyuki Saijo
We have investigated several properties of rapidly rotating dynamic black holes generated by gravitational collapse of rotating relativistic stars. At present, numerical simulation…
Collision of two general geodesic particles around a Kerr black hole
Tomohiro Harada, Masashi Kimura
We obtain an explicit expression for the center-of-mass (CM) energy of two colliding general geodesic massive and massless particles at any spacetime point around a Kerr black hole…