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BÚSQUEDA DE POSIBLES PROGENITORES SIN MATERIA OSCURA DE LA GALAXIA ENANA ESFEROIDAL CARINA A TRAVÉS DE SIMULACIONES DE N-CUERPOS
LOOKING FOR POSSIBLE DARK MATTER FREE PROGENITORS OF THE CARINA DWARF SPHEROIDAL GALAXY USING N-BODY SIMULATIONS
Keywords:
Carina, Galaxias, enanas, formación, Materia oscura (es)Carina, Galaxies, dwarf, formation, Dark matter. (en)
Se presenta un estudio de la evolución de diferentes posibles progenitores sin materia oscura de la galaxia enana esferoidal Carina, una de las galaxias satélites de la Vía Láctea, mediante simulaciones numéricas Newtonianas de N-Cuerpos. No fue posible reproducir completamente las propiedades observacionales de Carina, y por consiguiente no se pudo determinar un posible progenitor sin materia oscura para la misma; sin embargo, progenitores con masa inicial 1x107 M. y radios de Plummer 0.5 y 0.6 kpc, reprodujeron los valores observacionales de Carina para tres de las cinco variables estudiadas (radio de brillo medio, dispersión de velocidades sobre la visual y distancia galactocéntrica). Por lo tanto estos progenitores podrán ser la base para posteriores trabajos sobre el origen de la galaxia enana Carina.
We present a study of the evolution of several different dark matter free possible progenitors of the Carina dSph galaxy, one of the satellites of the Milky Way, using Newtonian numerical N-body simulations. It was not possible to reproduce all the observed properties of Carina, therefore a possible dark matter free progenitor of it was not found; nevertheless, progenitors with initial mass 1x107 M. and Plummer radii 0.5 and 0.6 kpc reproduced the observational values of Carina for three of the five studied variables (half light radius, line-of-sight velocity dispersion and galactocentric distance). Thus, those satellites could be the starting point for further work about the origin of the Carina dwarf galaxy.
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