Analysis of radial velocities in the Antlia cluster (con referato)

FAVIO R. FAIFER; ANALÍA V. SMITH CASTELLI; JUAN PABLO CALDERÓN; JUAN PABLO CASO; LILIA P. BASSINO

Salta, Provincia de Salta

Congreso; 53 Reunión Anual de la Asociación Argentina de Astronomía; 2010

Asociación Argentina de Astronomía

We present preliminary results of a radial velocity survey in the central region of the Antlia cluster. These velocities have been measured on spec- tra obtained, in the 2008A and 2009A semesters, with GMOS (GEMINI South). In this way, several dwarf galaxies that had no previous radial velocities, have been confirmed as cluster members. Our work is based on the Ferguson & Sandage (1990) catalogue, in which originally only 6% of the catalogued galaxies (375) had radial velocities. Thanks to the newly determined radial velocities we are able to begin to disentangle the cluster internal structure.