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- Instituto Superior TécnicoPT44 papers
- Centre National de la Recherche ScientifiqueFR35 papers
- Instituto Politécnico de LisboaPT33 papers
- Institute of Astrophysics and Space SciencesPT25 papers
- Universidade Nova de LisboaPT15 papers
- European Southern ObservatoryCL13 papers
- University of ÉvoraPT13 papers
- University of Hong KongHK13 papers
- University of PortsmouthGB13 papers
- Instituto de Engenharia de Sistemas e Computadores Investigação e DesenvolvimentoPT11 papers
- European Organization for Nuclear ResearchCH10 papers
- Observatoire Cantonal de NeuchâtelCH10 papers
39 papers · 1 filter
Modified Theories of Gravity: Traversable Wormholes
Miguel A. Oliveira
This MSc thesis is divided in to two parts. The first, covers the foundations of theories of gravitation, and, the second incorporates original work on the subject of the existence…
Two-fluid dark matter models
Tiberiu Harko, Francisco S. N. Lobo
We investigate the possibility that dark matter is a mixture of two non-interacting perfect fluids, with different four-velocities and thermodynamic parameters. The two-fluid model…
f(R,T) gravity
Tiberiu Harko, Francisco S. N. Lobo, Shin'ichi Nojiri +1
We consider f(R,T) modified theories of gravity, where the gravitational Lagrangian is given by an arbitrary function of the Ricci scalar R and of the trace of the stress-energy te…
The role of shell crossing on the existence and stability of trapped matter shells in spherical inhomogeneous Λ-CDM models
Morgan Le Delliou, Filipe C. Mena, José Pedro Mimoso
We analyse the dynamics of trapped matter shells in spherically symmetric inhomogeneous Λ-CDM models. The investigation uses a Generalised Lemaître-Tolman-Bondi description with in…
Nonminimal curvature-matter coupled wormholes with matter satisfying the null energy condition
Nadiezhda Montelongo Garcia, Francisco S. N. Lobo
Recently, exact solutions of wormhole geometries supported by a nonminimal curvature-matter coupling were found, where the nonminimal coupling minimizes the violation of the null e…
Superkicks in ultrarelativistic encounters of spinning black holes
Ulrich Sperhake, Emanuele Berti, Vitor Cardoso +2
We study ultrarelativistic encounters of two spinning, equal-mass black holes through simulations in full numerical relativity. Two initial data sequences are studied in detail: on…