Classical and Quantum Gravity 33(18) 185005-185005 2016年9月 [査読有り]
Applying the Pomeransky inverse scattering method to the four-dimensional vacuum Einstein equations and using the Levi-Cività solution as a seed, we construct a two-soliton solution with cylindrical symmetry. In our previous work, we constructed t...
We study the self-similar motion of a string in a self-similar spacetime by introducing the concept of a self-similar string, which is defined as the world sheet to which a homothetic vector field is tangent. It is shown that in Nambu-Goto theory,...
Physical Review D - Particles, Fields, Gravitation and Cosmology 92(2) 2015年7月 [査読有り]
The existence of stable bound orbits of test particles is one of the most characteristic properties in black hole spacetimes. In higher-dimensional black holes, due to the dependence of gravity on the spacetime dimensions, there is no stable bound...
Physical Review D - Particles, Fields, Gravitation and Cosmology 91(12) 2015年6月 [査読有り]
Applying the Pomeransky inverse scattering method to the four-dimensional vacuum Einstein equation and using the Levi-Cività solution for a seed, we construct a cylindrically symmetric single-soliton solution. Although the Levi-Cività spacetime ge...
Physical Review D - Particles, Fields, Gravitation and Cosmology 91(8) 2015年4月 [査読有り]
The geodesic equation in the five-dimensional singly rotating black ring is nonintegrable, unlike the case of the Myers-Perry black hole. In the Newtonian limit of the black ring, its geodesic equation agrees with the equation of motion of a parti...
Journal of Physics: Conference Series 314 012113-012113 2011年9月 [査読有り]
We study stable bound orbits of a free particle around a black ring. Unlike the higher-dimensional black hole case, we find that there exist stable bound orbits in toroidal spiral shape near the ring axis and stable circular orbits on the axis. In...
人文科学研究科
理学部