ICATE   21876
INSTITUTO DE CIENCIAS ASTRONOMICAS, DE LA TIERRA Y DEL ESPACIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Major and minor mergers: global star formation efficiency
Autor/es:
MESA, VALERIA; MA. SOL ALONSO; DIEGO GARCÍA LAMBAS; ANA LAURA O'MILL
Lugar:
San Juan
Reunión:
Congreso; Reunión Anual de la Asociación Argentina de Astronomía; 2011
Institución organizadora:
Instituto de Ciencias Astronómicas de la Tierra y el Espacio
Resumen:
We study galaxy pair samples selected from the Sloan Digital Sky Survey
(SDSS-DR7) and we perform an analysis of minor and major mergers with
the aim of investigating the dependence of galaxy properties on
interactions. We build a galaxy pair catalog requiring r p < 25 kpc
h-1 and V < 350 km s-1 within redshift z < 0.1. By visual
inspection of SDSS images we removed false identifications and we
classify the interactions into three cat- egories: pairs undergoing
merging, M; pairs with evident tidal features, T ; and non disturbed, N.
We also divide the pair sample into minor and major interactions
according to the luminosity ratio of the galaxy members. We conclude
that the characteristics of the interactions and the ratio of lumi-
nosity galaxy pair members involved in a merger are important parameters
in setting galaxy properties.