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Título del libro: 14th Marcel Grossman Meeting On Recent Developments In Theoretical And Experimental General Relativity, Astrophysics And Relativistic Field Theories, Proceedings
Título del capítulo: Dark matter phase-space density distribution in dwarf spheroidal galaxies

Autores UNAM:
GILBERTO CARLOS GOMEZ REYES;
Autores externos:

Idioma:
Inglés
Año de publicación:
2018
Palabras clave:

Astrophysics; Phase space methods; Relativity; Dark matter; Dark matter halos; Dark matter particles; Dwarf galaxies; Halo; Phase space densities; Phase space density distribution; Quantum-statistical effects; Galaxies


Resumen:

Since the pioneering work of Tremaine&Gunn in 1979 to the present, many attempts have been presented to constrain the dark matter particle mass from the phase-space density evolution until the approximate point of virialization of dark matter halos. In particular, recent numerical simulations of the evolution of the phase-space density of dwarf spheroidal dark matter halos revealed a strong tension between the obtained particle mass bound and the lower limit of few keV from other astrophysical constraints. We propose a novel approach to calculate the phase-space density distribution in dwarf galaxies, to show that such a discrepancy disappear if the dark matter distribution possesses a core in which quantum statistical effects are important, as in the case of the dark matter profiles of keV fermions recently introduced by Ruffini, Argüelles and Rueda (2015). Copyright © 2018 by the Editors.All rights reserved.


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