J/A+A/470/39 Substructures in WINGS clusters (Ramella+, 2007)
Substructures in WINGS clusters.
Ramella M., Biviano A., Pisani A., Varela J., Bettoni D., Couch W.J.,
D'onofrio M., Dressler A., Fasano G., Kjaergaard P., Moles M.,
Pignatelli E., Poggianti B.M.
<Astron. Astrophys., 470, 39-51 (2007)>
=2007A&A...470...39R 2007A&A...470...39R
ADC_Keywords: Clusters, galaxy ; Morphology
Keywords: galaxies: clusters: general - galaxies: elliptical and lenticular, cD
Abstract:
We search for and characterize substructures in the projected
distribution of galaxies observed in the wide field CCD images of the
77 nearby clusters of the WIde-field Nearby Galaxy-cluster Survey
(WINGS). This sample is complete in X-ray flux in the redshift range
0.04<z<0.07.
We search for substructures in WINGS clusters with DEDICA, an
adaptive-kernel procedure. We test the procedure on Monte-Carlo
simulations of the observed frames and determine the reliability for
the detected structures.
Description:
WINGS is an all-sky, photometric (multi-band) and spectroscopic
survey, whose global goal is the systematic study of the local cosmic
variance of the cluster population and of the properties of cluster
galaxies as a function of cluster properties and local environment.
The WINGS sample consists of 77 clusters selected from three X-ray
flux limited samples compiled from ROSAT All-Sky Survey data, with
constraints just on the redshift (0.04<z<0.07) and distance from
the galactic plane (|b|≥20deg). The core of the project consists of
wide-field optical imaging of the selected clusters in the B and V
bands. The imaging data were collected using the WFC@INT (La Palma)
and the WFI@MPG/ESO2.2 (La Silla) in the northern and southern
hemispheres, respectively.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 59 159 Catalog of substructures
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See also:
IX/29 : ROSAT All-Sky Survey Faint Source Catalog (Voges+ 2000)
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Name Parent cluster name
9- 10 A2 --- Class Classification of the structure together with
their order number (1)
13- 20 F8.4 deg RAdeg Right ascension in decimal degrees of the
DEDICA peak (J2000)
23- 30 F8.4 deg DEdeg Declination in decimal degrees of the
DEDICA peak (J2000)
33- 35 F3.1 arcmin amaj Major axis (2)
37- 40 F4.2 --- ell Ellipticity (2)
43- 45 I3 deg PA [-90/90] Position angle (2)
47- 53 F7.5 10+12solLum Lum ?=- Luminosity
55- 59 F5.1 --- chi2 chi2S parameter
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Note (1): Classification of the structure as follows:
M = main
S = subcluster
B = background
Note (2): The parameters of the ellipse we obtain from the variance matrix
of the coordinates of galaxies in the substructure.
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Nomeclature note:
Objects are identified as [RBP2007] DDD.dddd+DD.dddd in Simbad
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 30-Oct-2007