J/MNRAS/407/2207 Group of early-type galaxies (Fraix-Burnet+, 2010)
Structures in the fundamental plane of early-type galaxies.
Fraix-Burnet D., Dugue M., Chattopadhyay T., Chattopadhyay A.K., Davoust E.
<Mon. Not. R. Astron. Soc., 407, 2207-2222 (2010)>
=2010MNRAS.407.2207F 2010MNRAS.407.2207F
ADC_Keywords: Clusters, galaxy ; Galaxy catalogs
Keywords: methods: statistical - galaxies: elliptical and lenticular, cD -
galaxies: evolution - galaxies: formation -
galaxies: fundamental parameters
Abstract:
The fundamental plane of early-type galaxies is a rather tight
three-parameter correlation discovered more than 20yr ago. It has
resisted both a global and precise physical interpretation despite
a consequent number of works, observational, theoretical or using
numerical simulations. It appears that its precise properties depend
on the population of galaxies in study. Instead of selecting a priori
these populations, we propose to objectively construct homologous
populations from multivariate analyses. We have undertaken
multivariate cluster and cladistic analyses of a sample of 56
low-redshift galaxy clusters containing 699 early-type galaxies,
using four parameters: effective radius, velocity dispersion, surface
brightness averaged over effective radius and Mg2 index.
Description:
We thus chose the data compiled and standardized by Hudson et al.
(2001, Cat. J/MNRAS/327/265) for 699 early-type galaxies in 56
clusters, in the redshift range from 0.007 to 0.053 (Streaming Motions
of Abell Clusters (SMAC) catalogue).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablec1.dat 18 699 List of galaxies for each group
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See also:
J/MNRAS/327/265 : SMAC. III. Fundamental Plane catalog (Hudson+, 2001)
J/MNRAS/327/249 : SMAC. II. Fundamental Plane photometric data (Smith+, 2001)
Byte-by-byte Description of file: tablec1.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Group Group designation (C1-C7) (1)
4- 18 A15 --- SMAC Galaxy name (2)
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Note (1): See section 3.2 and Figure B1 for further details.
Figure B1: Cladogram obtained with four parameters. It is a majority
rule consensus of 986 equally parsimonious trees. The branches are
coloured according to the value of Mg2 (from dark blue to yellow
through green as Mg2 increases). The outer annulus is formed by the
names of the galaxies, with colours according to the group (numbered
from C1 to C7) as detailed in Table c1.
Note (2): From Hudson et al., 2001, Cat. J/MNRAS/327/265.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 14-Mar-2011