Bibcode
Caon, N.; Capaccioli, M.; D'Onofrio, M.
Referencia bibliográfica
Astronomy and Astrophysics Suppl. 106, 199-242 (1994)
Fecha de publicación:
8
1994
Número de citas
112
Número de citas referidas
98
Descripción
We present the B-band surface photometry of 19 early-type galaxies of
the Virgo cluster, and of 28 galaxies of the same morphological type
belonging to the Fornax clusters, obtained through the `global mapping'
technique which couples CCD and photographic plates. Taking into account
33 galaxies already studied by Caon et al. (1990) with the same
methodology, the Virgo sample of early-type galaxies is now 80% complete
down to B_T_=14. The Fornax sample is 95% complete down to B_T_=15. The
geometric and photometric properties of the total sample of 80 galaxies
are derived measuring accurate light profiles, ellipticities, position
angles and Fourier coefficients of the isophotes. The main sources of
errors of the `global mapping' procedure are reviewed and the effects of
seeing discussed. Global galaxian parameters such as total luminosity,
effective radius, and effective surface brightness, are computed for the
whole sample in a homogeneous way. Our goal is to create an unbiased set
of data to be used for investigating the process of galaxy formation and
evolution.