Browsing by Author "Martinez, A. Perez"
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- Constraints on the braneworld from compact starsPublication . Felipe, Ricardo Gonzalez; Paret, D. Manreza; Martinez, A. PerezAccording to the braneworld idea, ordinary matter is confined on a three-dimensional space (brane) that is embedded in a higher-dimensional space-time where gravity propagates. In this work, after reviewing the limits coming from general relativity, finiteness of pressure and causality on the brane, we derive observational constraints on the braneworld parameters from the existence of stable compact stars. The analysis is carried out by solving numerically the brane-modified Tolman–Oppenheimer–Volkoff equations, using different representative equations of state to describe matter in the star interior. The cases of normal dense matter, pure quark matter and hybrid matter are considered.
- Quantum magnetic collapse of a partially bosonized npe-gas: Implications for astrophysical jetsPublication . Gonzalez Felipe, Ricardo; Martinez, A. Perez; Rojas, H. Perez; Quintero Angulo, GretelWe study the quantum magnetic collapse of a partially bosonized npe-gas and obtain that this type of collapse might be one of the mechanisms behind matter expulsion out of compact objects. We check also that this gas might form a stable stream of matter whose collimation is due to its strong self-generated magnetic field. Possible astrophysical applications of these results, in particular related to jet formation and its maintenance, are discussed.