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14 papers · 2 filters
Braking--Radiation: An Energy Source for a Relativistic Fireball
C. Barrabes, P. A. Hogan
If the Schwarzschild black-hole is moving rectilinearly with uniform 3-velocity and suddenly stops, according to a distant observer, then we demonstrate that this observer will see…
Bursts of Radiation and Recoil Effects in Electromagnetism and Gravitation
C. Barrabès, P. A. Hogan
The Maxwell field of a charge e which experiences an impulsive acceleration or deceleration is constructed explicitly by subdividing Minkowskian space-time into two halves bounded…
On fine differentiability properties of horizons and applications to Riemannian geometry
P. T. Chrusciel, J. H. G. Fu, G. J. Galloway +1
We study fine differentiability properties of horizons. We show that the set of end points of generators of a n-dimensional horizon H (which is included in a (n+1)-dimensional spac…
Accelerating Universes with Scaling Dark Matter
M. Chevallier, D. Polarski
Friedmann-Robertson-Walker universes with a presently large fraction of the energy density stored in an -component with , are considered. We find all the critical poin…
Scalar-tensor gravity in an accelerating universe
G. Esposito-Farese, D. Polarski
We consider scalar-tensor theories of gravity in an accelerating universe. The equations for the background evolution and the perturbations are given in full generality for any par…
Quantum metric fluctuations and Hawking radiation
R. Parentani
In this Letter we study the gravitational interactions between outgoing configurations giving rise to Hawking radiation and in-falling configurations. When the latter are in their…