J/MNRAS/313/469 Streaming motions of galaxy clusters. I. (Smith+, 2000)
Streaming motions of galaxy clusters within 12000km/s
I. New spectroscopic data.
Smith R.J., Lucey J.R., Hudson M.J., Schlegel D.J., Davies R.L.
<Mon. Not. R. Astron. Soc. 313, 469 (2000)>
=2000MNRAS.313..469S 2000MNRAS.313..469S
ADC_Keywords: Clusters, galaxy ; Redshifts ; Velocity dispersion
Keywords: galaxies: clusters: general - galaxies: distance and redshifts -
galaxies: elliptical and lenticular, cD - cosmology: observations -
large-scale structure of Universe
Abstract:
The present paper is the first in a series presenting results of the
"Streaming Motions of Abell Cluster" (SMAC) project. We present new
spectroscopic data for 532 early-type galaxies, predominantly Abell
cluster members with cz<12000km/s. We tabulate 919 individual
measurements, from six observing runs, for recession velocity, cz,
central velocity dispersion, σ, and magnesium line-strength
indices, Mg2 and Mgb. The median estimated error, per measurement,
in σ is 5 per cent. The Mg2 line-strength data have median
errors of 0.009mag. The observed scatter between repeat measurements
is largely accounted for by photon-counting errors. These data will be
employed in forthcoming papers, where they will form part of a merged
and standardized catalogue of Fundamental Plane data for use in
cluster distance estimates and peculiar velocity analyses.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 94 919 New spectroscopic data from the six observing runs
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See also:
VII/198 : Mark III Catalog of Galaxy Peculiar Velocities (Willick+ 1997)
J/MNRAS/327/249 : SMAC. II. Fundamental Plane photometric data (Smith+, 2001)
J/MNRAS/327/265 : SMAC. III. Fundamental Plane catalog (Hudson+, 2001)
J/MNRAS/327/1004 : SBF and SMAC synthesis (Blakeslee+, 2001)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Galaxy Galaxy designation
17- 18 I2 h RAh Right ascension (J2000)
20- 21 I2 min RAm Right ascension (J2000)
23- 27 F5.2 s RAs Right ascension (J2000)
29 A1 --- DE- Declination sign (J2000)
30- 31 I2 deg DEd Declination (J2000)
33- 34 I2 arcmin DEm Declination (J2000)
36- 39 F4.1 arcsec DEs Declination (J2000)
41- 46 A6 --- Cluster Cluster assignments of SMAC-III for galaxies
which form part of the final FP sample
48- 52 A5 --- Run Observing run from which each measurement
originates (1)
54- 56 I3 --- S/N Signal-to-noise ratio
58- 62 I5 km/s cz Recession velocity, cz☉
64- 66 I3 km/s sigma Central velocity dispersion (2)
68- 69 I2 km/s e_sigma rms uncertainty on sigma (ecz=esigma/1.2)
71- 75 F5.3 mag Mgb' Magnesium index Mgb'
77- 81 F5.3 mag e_Mgb' rms uncertainty on Mgb'
83- 87 F5.3 mag Mg2 Magnesium index Mg2
89- 93 F5.3 mag e_Mg2 rms uncertainty on Mg2
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Note (1): Log of spectroscopic observing runs.
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Run Date Telescope Spectral range(s) Aperture
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A94 94.4 3.9m AAT 4800-5600Å, 4940-5740Å 3.0x3.8
A95B 95/5 3.9m AAT 4800-5600Å, 4940-5740Å 3.0x3.8
A95B 95/9 3.9m AAT 4800-5600Å, 4940-5740Å 3.0x3.8
I95 95/2 2.5m INT 4785-5808Å 3.0x3.4
I97JA 97/1 2.5m INT 4785-5808Å 3.0x3.4
I97MA 977/3 2.5m INT 4785-5808Å 3.0x3.4
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Note (2): The I97JA velocity dispersions have been corrected for the
S/N effect as discussed in the text, but the data are not corrected
for aperture effects or for run-to-run offsets.
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History: From electronic version
(End) James Marcout, Patricia Bauer [CDS] 22-May-2000