University of Puerto Rico at Río Piedras

output

19922025

most citedThe Arecibo Legacy Fast ALFA Survey: I. Science Goals, Survey Design and Strategy

830 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 gr-qcShow all

14 papers · 1 filter

gr-qc2015★ 10 cited

Embeddings for General Relativity

J. Ponce de Leon

We present a systematic approach to embed $n$ -dimensional vacuum general relativity in an $(n + 1)$ -dimensional pseudo-Riemannian spacetime whose source is either a (non)zero cosmo…

gr-qc2006★ 12 cited

Comment on ``Can gravity distinguish between Dirac and Majorana neutrinos?''

José F. Nieves, Palash B. Pal

This is a comment on the paper gr-qc/0605153, by Singh, Mobed and Papini.

gr-qc2005★ 16 cited

An analytic model for the transition from decelerated to accelerated cosmic expansion

J. Ponce de Leon

We consider the scenario where our observable universe is devised as a dynamical four-dimensional hypersurface embedded in a five-dimensional bulk spacetime, with a large extra dim…

gr-qc2005★ 23 cited

Reinventing spacetime on a dynamical hypersurface

J. Ponce de Leon

In braneworld models, Space-Time-Matter and other Kaluza-Klein theories, our spacetime is devised as a four-dimensional hypersurface {\it orthogonal} to the extra dimension in a fi…

gr-qc2004★ 10 cited

Transition from decelerated to accelerated cosmic expansion in braneworld universes

J. Ponce de Leon

Braneworld theory provides a natural setting to treat, at a classical level, the cosmological effects of vacuum energy. Non-static extra dimensions can generally lead to a variable…

gr-qc2003★ 432 cited

Black Hole Spectroscopy: Testing General Relativity through Gravitational Wave Observations

Olaf Dreyer, Bernard Kelly, Badri Krishnan +3

Assuming that general relativity is the correct theory of gravity in the strong field limit, can gravitational wave observations distinguish between black hole and other compact ob…

gr-qc2002★ 12 cited

FLRW Universes from "Wave-Like" Cosmologies in 5D

J. Ponce de Leon

We consider the evolution of a 4D-universe embedded in a five-dimensional (bulk) world with a large extra dimension and a cosmological constant. The cosmology in 5D possesses "wave…

gr-qc2002★ 24 cited

Invariant definition of rest mass and dynamics of particles in 4D from bulk geodesics in brane-world and non-compact Kaluza-Klein theories

J. Ponce de Leon

In the Randall-Sundrum brane-world scenario and other non-compact Kaluza-Klein theories, the motion of test particles is higher-dimensional in nature. In other words, all test part…

gr-qc2002★ 86 cited

Hydrostatic Equilibrium of a Perfect Fluid Sphere with Exterior Higher-Dimensional Schwarzschild Spacetime

J. Ponce de Leon, Norman Cruz

We discuss the question of how the number of dimensions of space and time can influence the equilibrium configurations of stars. We find that dimensionality does increase the effec…

gr-qc2002★ 21 cited

Variation of G, $Λ_{(4)}$ and Vacuum Energy From Brane-World Models

J. Ponce de Leon

In brane-world theory in five dimensions, the bulk metric is usually written in gaussian coordinates, where $g_{4 μ} = 0$ and $g_{44} = - 1$ . However, the choice $g_{44} = - 1$ is a…

gr-qc2001★ 108 cited

Equivalence Between Space-Time-Matter and Brane-World Theories

J. Ponce de Leon

We study the relationship between space-time-matter (STM) and brane theories. These two theories look very different at first sight, and have different motivation for the introduct…

gr-qc2001★ 35 cited

Does The Force From an Extra Dimension Contradict Physics in 4D?

J. Ponce de Leon

We examine the question of whether violation of 4D physics is an inevitable consequence of existence of an extra non-compactified dimension. Recent investigations in membrane and K…

gr-qc2001★ 29 cited

The Effective Energy-Momentum Tensor in Kaluza-Klein Gravity With Large Extra Dimensions and Off-Diagonal Metrics

J. Ponce de Leon

We consider a version of Kaluza-Klein theory where the cylinder condition is not imposed. The metric is allowed to have explicit dependence on the "extra" coordinate(s). This is th…

gr-qc1999★ 5 cited

Non-universal gravitational couplings of neutrinos in matter

Jose F. Nieves, Palash B. Pal

When neutrinos travel through a normal matter medium, the electron neutrinos couple differently to gravity compared to the other neutrinos, due to the presence of electrons in the…

Embeddings for General Relativity

Comment on ``Can gravity distinguish between Dirac and Majorana neutrinos?''

An analytic model for the transition from decelerated to accelerated cosmic expansion

Reinventing spacetime on a dynamical hypersurface

Transition from decelerated to accelerated cosmic expansion in braneworld universes

Black Hole Spectroscopy: Testing General Relativity through Gravitational Wave Observations

FLRW Universes from "Wave-Like" Cosmologies in 5D

Invariant definition of rest mass and dynamics of particles in 4D from bulk geodesics in brane-world and non-compact Kaluza-Klein theories

Hydrostatic Equilibrium of a Perfect Fluid Sphere with Exterior Higher-Dimensional Schwarzschild Spacetime

Variation of G, Λ(4)​ and Vacuum Energy From Brane-World Models

Equivalence Between Space-Time-Matter and Brane-World Theories

Does The Force From an Extra Dimension Contradict Physics in 4D?

The Effective Energy-Momentum Tensor in Kaluza-Klein Gravity With Large Extra Dimensions and Off-Diagonal Metrics

Non-universal gravitational couplings of neutrinos in matter

Variation of G, $Λ_{(4)}$ and Vacuum Energy From Brane-World Models