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Efficient gravitational lens optical scalars calculation of black holes with angular momentum
(Wiley Blackwell Publishing, Inc, 2020-03)
We provide new very simple and compact expressions for the efficient calculation of gravitational lens optical scalars for Kerr space-time, which are exact along any null geodesic. These new results are obtained recurring ...
Elements of a gravitational lens system assuming an elliptical galaxy model
(Revista Mexicana de Astronomia y Astrofisica, 2018)
Mario Bunge on Gravitational Waves and the Reality of Spacetime
(Springer, 2018-06)
I discuss the recent claims made by Mario Bunge on the philosophical implications of the discovery of gravitational waves. I think that Bunge is right when he points out that the detection implies the materiality of ...
Evaluation of the Anomalous Force Detected in the Datta, Yin and Vargas Experiment, According to Mbelek and Lachièze-Rey Scalar-Tensor Theory of Gravitation
(Springer, 2020-05)
An analysis is presented of the experiment by Datta, Yin and Vargas in the light of the Mbelek and Lachieze-Rey scalar-tensor theory of gravitation, showing that this theory reproduces the magnitude and sign of the measured ...
Text Summarization using Gravitational Search Algorithm
(Universidad del Zulia, 2019)
Sources of gravitational waves in asymptotically flat Einstein-Maxwell spacetime
(Springer/Plenum Publishers, 2017-02)
In this work, the dynamic of isolated systems in general relativity is described when gravitational radiation and electromagnetic fields are present. In this construction, the asymptotic fields received at null infinity ...
Entropic forces and Newton's gravitation
(Multidisciplinary Digital Publishing Institute, 2020-02)
Our subject of interest here is entropic forces, as re-interpreted by Verlinde with reference to gravitation, that is, by appealing to Verlinde’s conception of an entropic (statistically emergent) gravity advanced in ...
Inflationary gravitational waves from unified spinor fields
(Springer, 2018-12)
Recent observations of Gravitational Waves (GW) generated by black-hole collisions have opened a new window to explore the universe in diverse scales. Detection of primordial gravitational waves is expected to happen in ...
Round table: Dark matter vs. alternative gravitation. Dark matter or another kind of gravity?
(Asociación Argentina de Astronomía, 2016)
En esta nota ofrezco una breve discusión sobre la necesidad de postular la materia oscura para nuestra comprensión del Universo.