J/MNRAS/259/233 Cluster SC2008-57(A3667) (Sodre+ 1992)
The cluster of galaxies SC2008-57(A3667)
SODRE L., CAPELATO H.V., STEINER J.E., PROUST D., MAZURE A.
<Mon. Not. R. Astron. Soc. 259, 233 (1992)>
=1992MNRAS.259..233S 1992MNRAS.259..233S
ADC_Keywords: Clusters, galaxy; Photometry; Spectroscopy; Positional data;
Magnitudes; Radial velocities
Keywords: catalogues - galaxies: clustering - galaxies: distances and redshifts
- galaxies: luminosity function, mass function - galaxies: photometry.
Descriptions: (Abstract of the paper)
We present the results of photometric and spectroscopic observations
of the cluster of galaxies SC2008-57 (A3667). The observations have
resulted in a catalogue with positions and magnitudes for 203
galaxies, complete at b_25 = 18.0, and radial velocities for 128
galaxies, 91 per cent complete at b_25 = 17.5. The cluster can be
classified as type L because its galaxy distribution is highly
flattened. It shows two strong concentrations: a main concentration,
centred on the cluster brightest galaxy (a D galaxy) and coincident
with the peak of X-ray emission, and a substructure around the second
brightest galaxy (also a D galaxy). Most of the galaxies in this
substructure seem to be bound to the second-brightest galaxy, forming
a dynamical subunit inside the cluster. The extreme flattening of the
cluster may at least partially be due to the presence of the
substructure. The cluster also shows evidence for luminosity
segregation, with the brightest galaxies being preferentially found in
high galaxy density regions. Most of the luminosity segregation,
however, is produced by galaxies associated with the two clumps around
the D galaxies, suggesting that dynamical friction is effective in
subclusters with low velocity dispersions and may be associated with
the formation of D galaxies. The velocity dispersion of SC2008-57 is
high, about 1200 km/s, but consistent with the observed X-ray
luminosity. The cluster mass, derived using several estimators, is
about 2.6 x 10^15 M_solar. Both the cluster mass and velocity
dispersion may be overestimates due to the presence of the
substructure.
Notes:
* In order to execute LaTeX of "t3.tex", a definition file "macros.tex" is
needed in which at least definitions of \kmsec, \double, \etal are included.
Comment from the author (SODRE L.):
* The galaxy numbers in the Table 2 of the paper were not those from the Table
3. The correct numbers are 065, 086, 087, 097, 100, 120, respectively.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3 60 203 Galaxy catalogue of the cluster of
galaxies SC2008-57 (A3667)
t3.tex 80 300 LaTeX Table 3
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Historical notes:
The catalogue was provided by courtesy of L. Sodre to H. Andernach;
it was numbered A108 in H. Andernach's "List of Astronomical Catalogues
and Documents kindly provided on request by various authors"
08-Nov-1993: First archived in J/MNRAS/259/233.
-Jan-1994: Amended, removing a supplementary file following the author's
comment.
(The date of the latest archive, see the date of each file.)
Byte-per-byte Description of file: table3
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Bytes Format Unit Label Explanation
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1- 4 I4 --- N [1,203]+ galaxy number
7- 8 I2 h RAh [20] right ascension (hours) (B1950)
10- 11 I2 min RAm [3,13] right ascension (minutes)
13- 16 F4.1 s RAs [0,60] right ascension (seconds)
18 A1 . DE- [-]! declination sign
19- 20 I2 deg DEd [56,57] declination (degrees) (B1950)
22- 23 I2 arcmin DEm declination (minutes)
25- 26 I2 arcsec DEs declination (seconds)
28- 31 I4 arcsec X [269,4747] Cartesian coordinate X measured
over the plate
33- 36 I4 arcsec Y [0,5000] Cartesian coordinate Y measured
over the plate
38- 42 F5.2 mag b25 isophotal bj magnitude given by pixels
brighter than 25 mag/arcsec^2
43 A1 --- u_b25 [:] uncertainty flag of b25 magnitude due to
overlapping
45- 50 I6 km/s Vhelio []? heliocentric radial velocity
51 A1 --- u_Vhelio [?] uncertainty flag of Vhelio
52- 54 I3 km/s e_Vhelio [0,]? error of Vhelio
56 A1 --- r_Vhelio [1-3] code for the reference of Vhelio
See the caption of Table 3 of the paper.
58- 60 A3 --- NOTES [(1-6)] notes on the velocity determination
or on the galaxy identification
See the caption of Table 3 of the paper.
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(End) Koichi Nakajima [CDS] 04-Nov-1993