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14 papers · 2 filters
The black hole dynamical horizon and generalized second law of thermodynamics
Song He, Hongbao Zhang
The generalized second law of thermodynamics for a system containing a black hole dynamical horizon is proposed in a covariant way. Its validity is also tested in case of adiabatic…
Geometrical Expression of the Angular Resolution of a Network of Gravitational-Wave Detectors and Improved Localization Methods
Linqing Wen, Xilong Fan, Yanbei Chen
We report for the first time a method-independent geometrical expression for the angular resolution of an arbitrary network of interferometric gravitational wave (GW) detectors whe…
Five-dimensional PPN formalism and experimental test of Kaluza-Klein theory
Peng Xu, Yongge Ma
The parametrized post Newtonian formalism for 5-dimensional metric theories with a compact extra dimension is developed. The relation of the 5-dimensional and 4-dimensional formula…
State-Relevant Maxwell's Equation from Kaluza-Klein Theory
Jing Luan, Yongge Ma, Bo-Qiang Ma
We study a five-dimensional perfect fluid coupled with Kaluza-Klein (KK) gravity. By dimensional reduction, a modified form of Maxwell's equation is obtained, which is relevant to…
The frequency separations of stellar p-modes
W. M. Yang, S. L. Bi
Aims. The purpose of this work is to investigate a new frequency separation of stellar p-modes and its characteristics. Methods. Frequency separations are deduced from the asymptot…
Can gravitational dynamics be obtained by diffeomorphism invariance of action?
Sijie Gao, Hongbao Zhang
It has recently been suggested that the gravitational dynamics could be obtained by requiring the action to be invariant under diffeomorphism transformations. We argue that the act…