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Parmenides reloaded
(Springer, 2012-02)
I argue for a four dimensional, non-dynamical view of space-time, where becoming is not an intrinsic property of reality. This view has many features in common with the Parmenidean conception of the universe. I discuss ...
Galaxy triplets in Sloan Digital Sky Survey Data Release 7 - I. Catalogue
(Wiley Blackwell Publishing, Inc, 2012-04)
We present a new catalogue of galaxy triplets derived from the Sloan Digital Sky Survey Data Release 7. The identification of systems was performed considering galaxies brighter than M_r=-20.5 and imposing constraints ...
CENTAURUS A: THE EXTRAGALACTIC SOURCE OF COSMIC RAYS WITH ENERGIES ABOVE THE KNEE
(IOP PUBLISHING LTDBRISTOL, 2012)
The origin of cosmic rays at all energies is still uncertain. In this paper, we present and explore an astrophysical scenario to produce cosmic rays with energy ranging from below 10(15) to 3 x 10(20) eV. We show here that ...
Top of the cosmic ladder: on extragalactic distances and the Hubble tension
(Universidad de los AndesFísicaFacultad de CienciasDepartamento de Física, 2023-07-31)
La determinación precisa del Parámetro de Hubble sigue siendo un problema abierto en cosmología moderna. En investigaciones recientes, han surgido mediciones conflictivas de su valor en el presente (la Constante de Hubble) ...