Plano Entrópico de galaxias tempranas

VOLPE, MARIA GABRIELA; ALONSO, MARÍA VICTORIA; GARCÍA LAMBAS, DIEGO

Boletin de la Asociación Argentina de Astronomía

Asociacion Argentina de Astronomía

Año: 2010 vol. 53 p. 87 - 90

0571-3285

Early-type galaxies are systems in quasi-equilibrium and we can assume that their specific entropy is constant. This property is reflected in the ob- served correlations among photometric parameters describing the galaxy profiles. We discuss preliminary results of computing the specific entropy in several clusters and groups of galaxies. The galaxy sample is a subsample of the spectro-photometric ENEAR survey (da Costa et al. 2000) of early-type galaxies in the local Universe. The Entropic Plane would allow us to understand the Fundamental Plane of early-type galaxies in dynamical terms and the processes involved in such relationships.