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Gravitational-wave signatures of the absence of an event horizon. II. Extreme mass ratio inspirals in the spacetime of a thin-shell gravastar
Gravitational-wave signatures event horizon thin-shell gravastar
2010/3/18
We study gravitational-wave emission from the quasi-circular, extreme mass ratio inspiral of compact objects of mass m0 into massive objects of mass M>>m0 whose external metric is identical to the Sch...
On the existence of cosmological event horizon
Cosmological horizon strong energy condition positive cosmological constant
2010/3/17
We show that, for general static or axisymmetric stationary spacetimes, a cosmological horizon exists only if $R_{ab}n^{a}n^{b}< 0$ for a hypersurface orthogonal timelike $n^{a}$, at least over some p...