output
19932026
most citedMeasurements of Omega and Lambda from 42 High-Redshift Supernovae

18.1k citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions
Showing 2002 · gr-qcShow all

11 papers · 2 filters

gr-qc2002★ 35 cited

Gravitational Radiation from the radial infall of highly relativistic point particles into Kerr black holes

Vitor Cardoso, José P. S. Lemos

In this paper, we consider the gravitational radiation generated by the collision of highly relativistic particles with rotating Kerr black holes. We use the Sasaki-Nakamura formal…

gr-qc2002★ 19 cited

Optical activity induced by curvature in a gravitational pp-wave background

Alexander B. Balakin, Jose' P. S. Lemos

We study optical activity induced by curvature. The optical activity model we present has two phenomenological gyration parameters, within which we analyze three model cases, namel…

gr-qc2002★ 6 cited

Gravitational Optics: Self-phase modulation and harmonic cascades

J. T. Mendonca, Vitor Cardoso

Nonlinear wave interaction of low amplitude gravitational waves in flat space-time is considered. Analogy with optics is established. It is shown that the flat metric space-time is…

gr-qc2002★ 37 cited

Noncommutative Scalar Field Coupled to Gravity

O. Bertolami, L. Guisado

A model for a noncommutative scalar field coupled to gravity is proposed via an extension of the Moyal product. It is shown that there are solutions compatible with homogeneity and…

gr-qc2002★ 18 cited

Late-time particle creation from gravitational collapse to an extremal Reissner-Nordstrom black hole

Sijie Gao

We investigate the late time behavior of particle creation from an extremal Reissner-Nordstrom (RN) black hole formed by gravitational collapse. We calculate explicitly the particl…

gr-qc2002★ 12 cited

The radial infall of a highly relativistic point particle into a Kerr black hole along the symmetry axis

Vitor Cardoso, Jose' P. S. Lemos

In this Letter we consider the radial infall along the symmetry axis of an ultra-relativistic point particle into a rotating Kerr black hole. We use the Sasaki-Nakamura formalism t…

gr-qc2002★ 18 cited

Perturbations and Stability of Black Ellipsoids

Sergiu I. Vacaru

We study the perturbations of two classes of static black ellipsoid solutions of four dimensional vacuum Einstein equations. Such solutions are described by generic off--diagonal m…

gr-qc2002★ 9 cited

Horizons and Geodesics of Black Ellipsoids

Sergiu Vacaru

We analyze the horizon and geodesic structure of a class of 4D off--diagonal metrics with deformed spherical symmetries, which are exact solutions of the vacuum Einstein equations…

gr-qc2002★ 48 cited

Supergravity Inflation on the Brane

M. C. Bento, O. Bertolami, A. A. Sen

We study N=1 Supergravity inflation in the context of the braneworld scenario. Particular attention is paid to the problem of the onset of inflation at sub-Planckian field values a…

gr-qc2002★ 2k cited

Generalized Chaplygin Gas, Accelerated Expansion and Dark Energy-Matter Unification

M. C. Bento, O. Bertolami, A. A. Sen

We consider the scenario emerging from the dynamics of a generalized -brane in a spacetime. The equation of state describing this system is given in terms of the ener…

gr-qc2002★ 51 cited

Gravitational radiation from collisions at the speed of light: a massless particle falling into a Schwarzschild black hole

Vitor Cardoso, Jose' P. S. Lemos

We compute spectra, waveforms, angular distribution and total gravitational energy of the gravitiational radiation emitted during the radial infall of a massless particle into a Sc…