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Parity violation in graviton non-gaussianity

We study parity violation in graviton non-gaussianity generated during inflation. We develop a useful formalism to calculate graviton non-gaussianity. Using this formalism, we explicitly calculate…
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Supersymmetric black lenses in five dimensions

We present an asymptotically flat supersymmetric black lens solution with the horizon topology L(n,1)=S^3/Z_n in the five-dimensional minimal ungauged supergravity. We show that the black lens…
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Geometry of Killing spinors in neutral signature

We classify the supersymmetric solutions of minimal N = 2 gauged supergravity in four dimensions with neutral signature. They are distinguished according to the sign of the cosmological constant and…
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Hairy black holes in N = 2 gauged supergravity

A bstractWe construct black holes with scalar hair in a wide class of four-dimensional N =2 Fayet-Iliopoulosgaugedsupergravitytheoriesthatarecharacterizedbyaprepotential containing one free…
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Black Hole in the Expanding Universe from Intersecting Branes

We study physical properties and global structures of a time-dependent, spherically symmetric solution obtained via the dimensional reduction of intersecting M-branes. We find that the spacetime…
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Generalized Misner-Sharp quasi-local mass in Einstein-Gauss-Bonnet gravity

We investigate properties of a quasi-local mass in a higher-dimensional spacetime having symmetries corresponding to the isomertries of an $(n-2)$-dimensional maximally symmetric space in…
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Supersymmetry of the C-metric and the general Plebanski-Demianski solution

A bstractWe derive the necessary and sufficient conditions under which the general Plebanski-Demianski (PD) solution of Einstein-Maxwell theory with a negative cosmological constant admits Killing…
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6D (1,1) gauged supergravities from orientifold compactifications

We study dimensional reductions of M-theory/type II strings down to 6D in the presence of fluxes and spacetime filling branes and orientifold planes of different types. We classify all inequivalent…
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Quasinormal modes of black holes localized on the Randall-Sundrum 2-brane

We investigate conformal scalar, electromagnetic, and massless Dirac quasinormal modes of a brane-localized black hole. The background solution is the four-dimensional black hole on a 2-brane that…
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Bulk scalar emission from a rotating black hole pierced by a tense brane

We study the emission of scalar fields into the bulk from a six-dimensional rotating black hole pierced by a 3-brane. We determine the angular eigenvalues in the presence of finite brane tension by…
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