| Issue |
Astron. Astrophys. Suppl. Ser.
Volume 128, Number 2, March I 1998
|
|
|---|---|---|
| Page(s) | 299 - 308 | |
| DOI | https://doi.org/10.1051/aas:1998142 | |
| Published online | 15 March 1998 | |
Total magnitude, radius, colour indices, colour gradients and photometric type of galaxies *,**
Centre de Recherches Astronomique de Lyon, CNRS, Observatoire de Lyon, F-69561 St-Genis-Laval Cedex, France
Send offprint request to: Ph. Prugniel
Received:
6
March
1997
Accepted:
21
July
1997
We present a catalogue of aperture photometry of galaxies, in UBVRI,
assembled from three different origins:
(i) an update of the catalogue of Buta et al. (1995)
(ii) published photometric profiles and
(iii) aperture photometry performed on CCD images.
We explored different sets of growth curves to fit these data:
(i) The Sérsic law,
(ii) The net of growth curves used for the preparation of the RC3 and
(iii) A linear interpolation between the de Vaucouleurs (
) and
exponential laws. Finally we adopted the latter solution.
Fitting these growth curves, we
derive (1) the total magnitude, (2) the effective radius,
(3) the colour indices
and (4) gradients and (5) the photometric type of
5169
galaxies.
The photometric type is defined to statistically match the revised
morphologic type and parametrizes
the shape of the growth curve. It is coded from -9, for very concentrated
galaxies, to +10, for diffuse galaxies.
Key words: galaxies: fundamental parameters / galaxies: general / galaxies: photometry
© European Southern Observatory (ESO), 1998