Issue |
Astron. Astrophys. Suppl. Ser.
Volume 116, Number 3, May 1 1996
|
|
---|---|---|
Page(s) | 429 - 445 | |
DOI | https://doi.org/10.1051/aas:1996126 | |
Published online | 15 May 1996 |
Morphological classification and structural parameters for early-type galaxies in the Coma cluster *
1
CNRS–URA 285, Observatoire Midi-Pyrénées, 14 Avenue E. Belin, F-31400 Toulouse, France
2
O.C.A., Observatoire de Nice, B.P. 229, F-06304 Nice Cedex 4, France
Send offprint request to: E. Davoust
Received:
18
April
1995
Accepted:
27
September
1995
We present the results of an isophotal shape analysis of three
samples of galaxies in the Coma cluster. Quantitative
morphology, together with structural and photometric parameters,
is given for each galaxy. Special emphasis has been placed on
the detailed classification of early-type galaxies. The three
samples are: i) a sample of 97 early-type galaxies brighter than
mB = 17.00 falling within one degree from the center of the
Coma cluster; these galaxies were observed with CCD cameras,
mostly in good to excellent resolution conditions; ii) a
magnitude complete sample of 107 galaxies of all morphological
types down to mB = 17.00 falling in a circular region of 50
arcmin diameter, slightly offcentered to the North-West of the
cluster center; the images for this and the next sample come
from digitized photographic plates; iii) a complete comparison
sample of 26 galaxies of all morphological types down to mR =
16.05 (or mB
17.5), also in a region of 50 arcmin
diameter, but centered 2.6 degrees West of the cluster center.
The reliability of our morphological classifications and
structural parameters of galaxies, down to the adopted magnitude
limits, is assessed by comparing the results on those galaxies
for which we had images taken with different instrumentation
and/or seeing conditions, and by comparing our results with
similar data from other observers.
Key words: galaxies: clusters: individual: Coma / galaxies: elliptical and lenticular, cD / galaxies: fundamental parameters
Based on observations made with the 2-meter Télescope Bernard Lyot of Pic-du-Midi Observatory, operated by INSU (CNRS), with the 3.6-meter Canada-France-Hawaii telescope, operated by the National Research Council of Canada, The Centre National de la Recherche Scientifique of France and the University of Hawaii, U.S.A., and with the Mayall 4-meter telescope at Kitt Peak National Observatory, operated by AURA
© European Southern Observatory (ESO), 1996