Instituto Superior Técnico

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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 2014 · gr-qcShow all

21 papers · 2 filters

gr-qc2014★ 25 cited

Spin and quadrupole contributions to the motion of astrophysical binaries

Jan Steinhoff

Compact objects in general relativity approximately move along geodesics of spacetime. It is shown that the corrections to geodesic motion due to spin (dipole), quadrupole, and hig…

gr-qc2014★ 72 cited

Center of mass, spin supplementary conditions, and the momentum of spinning particles

L. Filipe Costa, José Natário

We discuss the problem of defining the center of mass in general relativity and the so-called spin supplementary condition. The different spin conditions in the literature, their p…

gr-qc2014★ 2 cited

Newtonian wormholes

José P. S. Lemos, Paulo Luz

A wormhole solution in Newtonian gravitation, enhanced through an equation relating the Ricci scalar to the mass density, is presented. The wormhole inhabits a spherically symmetri…

gr-qc2014★ 8 cited

Dynamics of Robertson-Walker spacetimes with diffusion

Artur Alho, Simone Calogero, Maria P. Machado Ramos +1

We study the dynamics of spatially homogeneous and isotropic spacetimes containing a fluid undergoing microscopic velocity diffusion in a cosmological scalar field. After deriving…

gr-qc2014★ 78 cited

Exploring New Physics Frontiers Through Numerical Relativity

Vitor Cardoso, Leonardo Gualtieri, Carlos Herdeiro +1

The demand to obtain answers to highly complex problems within strong-field gravity has been met with significant progress in the numerical solution of Einstein's equations - along…

gr-qc2014★ 36 cited

Black hole quasinormal modes in a scalar-tensor theory with field derivative coupling to the Einstein tensor

Masato Minamitsuji

We investigate the quasinormal modes of a test massless, minimally coupled scalar field on a static and spherically symmetric black hole in the scalar-tensor theory with field deri…

gr-qc2014★ 65 cited

Wormholes minimally violating the null energy condition

Mariam Bouhmadi-Lopez, Francisco S. N. Lobo, Prado Martin-Moruno

We consider novel wormhole solutions supported by a matter content that minimally violates the null energy condition. More specifically, we consider an equation of state in which t…

gr-qc2014★ 79 cited

The little sibling of the big rip singularity

Mariam Bouhmadi-Lopez, Ahmed Errahmani, Prado Martin-Moruno +2

We present a new cosmological event, which we named the little sibling of the big rip. This event is much smoother than the big rip singularity. When the little sibling of the big…

gr-qc2014★ 53 cited

On the global uniqueness for the Einstein-Maxwell-scalar field system with a cosmological constant. Part 3: Mass inflation and extendibility of the solutions

João L. Costa, Pedro M. Girão, José Natário +1

This paper is the third part of a trilogy dedicated to the following problem: given spherically symmetric characteristic initial data for the Einstein-Maxwell-scalar field system w…

gr-qc2014★ 41 cited

On the global uniqueness for the Einstein-Maxwell-scalar field system with a cosmological constant. Part 2: Structure of the solutions and stability of the Cauchy horizon

João L. Costa, Pedro M. Girão, José Natário +1

This paper is the second part of a trilogy dedicated to the following problem: given spherically symmetric characteristic initial data for the Einstein-Maxwell-scalar field system…

gr-qc2014★ 9 cited

Relativistic elasticity of rigid rods and strings

Jose Natario

We show that the equation of motion for a rigid one-dimensional elastic body (i.e. a rod or string whose speed of sound is equal to the speed of light) in a two-dimensional spaceti…

gr-qc2014★ 164 cited

I-Love-Q, Spontaneously: Slowly Rotating Neutron Stars in Scalar-Tensor Theories

Paolo Pani, Emanuele Berti

We construct models of slowly rotating, perfect-fluid neutron stars by extending the classical Hartle-Thorne formalism to generic scalar-tensor theories of gravity. Working at seco…

gr-qc2014★ 45 cited

Black Hole Universe with $Λ$

Chul-Moon Yoo, Hirotada Okawa

Time evolution of a black hole lattice universe with a positive cosmological constant $Λ$ is simulated. The vacuum Einstein equations are numerically solved in a cubic box with a b…

gr-qc2014★ 6 cited

Extremal Myers-Perry black holes in Born-Infeld-dilaton theory

Masoud Allahverdizadeh, Seyed H. Hendi, Ahmad Sheykhi

A class of perturbative charged rotating dilaton black hole solutions coupled to the nonlinear Born-Infeld electrodynamics is presented. The strategy for obtaining these solutions…

gr-qc2014

A perturbative approach for the study of compatibility between nonminimally coupled gravity and Solar System experiments

Orfeu Bertolami, Riccardo March, Jorge Páramos

We develop a framework for constraining a certain class of theories of nonminimally coupled (NMC) gravity with Solar System observations.

gr-qc2014★ 74 cited

Flowing along the edge: spinning up black holes in AdS spacetimes with test particles

Jorge V. Rocha, Raphael Santarelli

We investigate the consequences of throwing point particles into odd-dimensional Myers-Perry black holes in asymptotically anti-de Sitter (AdS) backgrounds. We restrict our attenti…

gr-qc2014★ 113 cited

On generic parametrizations of spinning black-hole geometries

Vitor Cardoso, Paolo Pani, Joao Rico

The construction of a generic parametrization of spinning geometries which can be matched continuously to the Kerr metric is an important open problem in General Relativity. Its re…

gr-qc2014★ 26 cited

Collapsing rotating shells in Myers-Perry-AdS $_{5}$ spacetime: A perturbative approach

Jorge V. Rocha, Raphael Santarelli, Térence Delsate

We study gravitational perturbations sourced by a rotating test shell collapsing into five-dimensional Myers-Perry black holes in anti-de Sitter (AdS). Our attention is restricted…

gr-qc2014★ 13 cited

Analytic approximations, perturbation theory, effective field theory methods and their applications

Vitor Cardoso, Rafael A. Porto

We summarize the parallel session B4: 'Analytic approximations, perturbation theory effective field theory methods and their applications' and the joint session B2/B4: 'Approximate…