3 papers
astro-ph2002
The WINGS Survey: a progress report
G. Fasano, B. Poggianti, D. Bettoni +7
A two-band (B and V) wide-field imaging survey of a complete, all-sky X-ray selected sample of 78 clusters in the redshift range z=0.04-0.07 is presented. The aim of this survey is…
astro-ph1999
The visible environment of gas-accreting galaxies
D. Bettoni, G. Galletta, F. Prada
We studied the environment of a sample of galaxies in which the presence of polar rings or the presence of gas- and stars- counterrotation is observed. These galaxies are believed…
astro-ph1997
The visible environment of polar ring galaxies
Chiara Brocca, Daniela Bettoni, Giuseppe Galletta
A statistical study of the environment around Polar Ring Galaxies is presented. Two kinds of search are performed: 1) a study of the concentration and diameters of all the objects…