La población de galaxias de baja luminosidad en el Grupo de NGC 5044

CELLONE, S. A.; BUZZONI, A.

Buenos Aires

Congreso; 45a. Reunión Anual AAA; 2002

AAA

We present preliminary results from a spectrophotometric study of thedwarf and low-luminosity galaxy population in the NGC 5044 Group. Weselected galaxies with 19.5 <= BT <= 15.5 (-12.7 <=MB -5 log(h0) <= -16.7) from the catalog ofFerguson & Sandage (1990, AJ 100, 1), for observation with the ESO3.6 m telescope + EFOSC2. We obtained direct images in the g, r, i, andz bands of the Gunn system for 33 galaxies in the catalog + 8 previouslynon-catalogued dwarf spheroidals. Spectroscopy (lambda ; 4300 - 6400Å) for a 13 galaxies subsample was also obtained. Our immediategoal is to obtain an accurate morphological and membershipclassification, allowing us to investigate the environmental effects onthe structure and colors of the galaxies. The following stage is to do amorphological, dynamical, and evolutionary study of the low-luminositygalaxy population in this group.