Stability of branes trapped by d-dimensional black holes (2009)
Hioki, Kenta, Miyamoto, Umpei, Nozawa, Masato
The system of extended objects interplaying with a black hole describes or mimics various gravitational phenomena. In this brief paper, we report the results of stability analysis of codimension-one...
Measurement of the Kerr Spin Parameter by Observation of a Compact Object's Shadow (2009)
A black hole casts a shadow as an optical appearance because of its strong gravitational field. We study how to determine the spin parameter and the inclination angle by observing the apparent shape...
Hidden symmetries, null geodesics, and photon capture in the Sen black hole (2008)
Important classes of null geodesics and hidden symmetries in the Sen black hole are investigated. First, we obtain the principal null geodesics and circular photon orbits. Then, an irreducible...