Alberto Vazquez Saa

• Abstract

  The present Thematic Project focuses on the context of Einstein's General Relativity, the physical and mathematical description of the spacetime and its associated phenomena. Its main research points can be grouped in the following topics: Fields in curved spacetimes and semi-classical gravitation, Geometric Aspects, Relativistic Astrophysics, and Analogue Models. Al these topics have bee…

  Physics and geometry of spacetime, AP.TEM
• 13rd European Conference on Complex Systems (ECCS13), AR.EXT
• First International Workshop Multimessenger Emissions from Sources of Gravitational Waves, AO.R

(Only some records are available in English at this moment)

• Abstract

  The project consists in a study of the main aspects of the spacetime causal structures in General Relativity, emphasizing event horizons.

  Introduction to the spacetime causal structure, BP.IC

• Abstract

  This project consists in some analytical and numerical studies on the so-called Robinson-Trautman spacetimes, which are vacuum non-stationary solutions of the Einstein equations corresponding to compact bodies surrounded by gravitational waves. From Robinson-Trautman spacetimes, one can access the non-linear regime of gravitational waves, a extremely relevant topic nowadays. (AU)

  Gravitational waves and the Robinson-Trautman spacetime, BP.MS

• Abstract

  The project consists in an introductory study of space-time Physics and Geometry, with focus on the Equivalence Principle and on event horizons.

  Introduction to the space-time physics and geometry, BP.IC

(Only some records are available in English at this moment)

• Abstract

  This Research Project, to be carried out during a one-year sabbatical leave in the group of Prof. Vitor Cardoso at the Center for Astrophysics and Gravitation (CENTRA) of the Instituto Superior Técnico (IST) of the University of Lisbon, proposes a systematic study of several physical and mathematical aspects of the new area called Black Hole Spectroscopy. Briefly, it consists in the simul…

  Black hole spectroscopy: physical and mathematical aspects, BE.PQ

• Abstract

  Horizons are essential specialized surfaces for the causal characterization of spacetimes in General Relativity. This project consists in a study on the possible geometric and topological classification of horizons, aiming a better understanding of their roles in the Physics and Mathematics of spacetime.

  Geometrical and topological properties of horizons in General Relativity, BE.EP.MS

• Abstract

  The general relativistic treatment of the radiation field of a spherically symmetric star introduces new features, which are absent in Newtonian gravity. One important result is the presence of the "Eddington Capture Sphere'', a radius for which the gravitational and radiation forces balance. This region is shown to be an attractor for the dynamics of test particles. We intent to deepen t…

  A dynamical study of the Eddington capture sphere, BE.EP.DR