2k citations · 12k across the 281 of their papers we have counts for
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Testing the Flyby Anomaly with the GNSS Constellation
O. Bertolami, F. Francisco, P. J. S. Gil +1
We propose the concept of a space mission to probe the so called flyby anomaly, an unexpected velocity change experienced by some deep-space probes using earth gravity assists. The…
What if ... General Relativity is not the theory?
Orfeu Bertolami
The nature of gravity is fundamental to understand the scaffolding of the Universe and its evolution. Einstein's general theory of relativity has been scrutinized for over ninety f…
Mimicking dark matter in galaxy clusters through a non-minimal gravitational coupling with matter
Orfeu Bertolami, Pedro Frazão, Jorge Páramos
In this work, one shows that a specific non-minimal coupling between the scalar curvature and matter can mimic the dark matter component of galaxy clusters. For this purpose, one a…
On the dynamics of perfect fluids in non-minimally coupled gravity
Orfeu Bertolami, António Martins
In this work we explore the consequences that a non-minimal coupling between geometry and matter can have on the dynamics of perfect fluids. It is argued that the presence of a sta…
Digging down the past
Orfeu Bertolami
It is often stated that cosmology is an extreme form of archeology that deals with aeons of time extending back to thousands of millions of years. One talks, for instance, of relic…
Probing the Flyby Anomaly with the Galileo Constellation
O. Bertolami, F. Francisco, P. J. S. Gil +1
In the last few years, the so-called flyby anomaly has been widely discussed, but remains still an illusive topic. This is due to the harsh conditions experienced during an Earth f…
Mimicking the cosmological constant: constant curvature spherical solutions in a non-minimally coupled model
J. Páramos, O. Bertolami
The purpose of this study is to describe a perfect fluid matter distribution that leads to a constant curvature region, thanks to the effect of a non-minimal coupling. This distrib…
OSS (Outer Solar System): A fundamental and planetary physics mission to Neptune, Triton and the Kuiper Belt
Bruno Christophe, Linda J. Spilker, John D. Anderson +46
The present OSS mission continues a long and bright tradition by associating the communities of fundamental physics and planetary sciences in a single mission with ambitious goals…
Hořava-Lifshitz Quantum Cosmology
Orfeu Bertolami, Carlos A. D. Zarro
In this work, a minisuperspace model for the projectable Hořava-Lifshitz (HL) gravity without the detailed balance condition is investigated. The Wheeler-deWitt equation is derived…
Testing the interaction of dark energy to dark matter through the analysis of virial relaxation of clusters Abell Clusters A586 and A1689 using realistic density profiles
Orfeu Bertolami, Francisco Gil Pedro, Morgan Le Delliou
Interaction between dark energy and dark matter is probed through deviation from the virial equilibrium for two relaxed clusters: A586 and A1689. The evaluation of the virial equil…
Phase-Space Noncommutativity and the Dirac Equation
Orfeu Bertolami, Raquel Queiroz
We consider full phase-space noncommutativity in the Dirac equation, and find that in order to preserve gauge invariance, configuration space noncommutativity must be dropped. The…
Modelling the reflective thermal contribution to the acceleration of the Pioneer spacecraft
F. Francisco, O. Bertolami, P. J. S. Gil +1
We present an improved method to compute the radiative momentum transfer in the Pioneer 10 & 11 spacecraft that takes into account both diffusive and specular reflection. The metho…