J/MNRAS/383/445 Radial velocities in the Norma cluster (A3627) (Woudt+, 2008)
The Norma cluster (ACO 3627).
I. A dynamical analysis of the most massive cluster in the Great Attractor.
Woudt P.A., Kraan-Korteweg R.C., Lucey J., Fairall A.P., Moore S.A.W.
<Mon. Not. R. Astron. Soc., 383, 445-457 (2008)>
=2008MNRAS.383..445W 2008MNRAS.383..445W
ADC_Keywords: Clusters, galaxy ; Radial velocities
Keywords: galaxies: clusters: individual: Norma cluster (ACO 3627) -
galaxies: elliptical and lenticular, cD -
galaxies: individual: WKK 6176 - galaxies: kinematics and dynamics
Abstract:
A detailed dynamical analysis of the nearby rich Norma cluster
(ACO 3627) is presented. From radial velocities of 296 cluster
members, we find a mean velocity of 4871±54km/s and a velocity
dispersion of 925km/s. The mean velocity of the E/S0 population
(4979±85km/s) is offset with respect to that of the S/Irr population
(4812±70km/s) by Δv=164km/s in the cluster rest frame. This
offset increases towards the core of the cluster. The E/S0 population
is free of any detectable substructure and appears relaxed. Its shape
is clearly elongated with a position angle that is aligned along the
dominant large-scale structures in this region, the so-called Norma
wall. The central cD galaxy has a very large peculiar velocity of
561km/s which is most probably related to an ongoing merger at the
core of the cluster.
Description:
Spectra were obtained with the 2dF facility on the 3.9m
Anglo-Australian Telescope on 2001 May 30.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 60 182 Results of the 2dF spectroscopy
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See also:
J/A+A/380/441 : Galaxies behind Southern Milky Way. II. (Woudt+, 2001)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 22 A22 --- Name Galaxy name (1)
24- 25 I2 h RAh Right ascension (J2000)
27- 28 I2 min RAm Right ascension (J2000)
30- 35 F6.3 s RAs Right ascension (J2000)
37 A1 --- DE- Declination sign (J2000)
38- 39 I2 deg DEd Declination (J2000)
41- 42 I2 arcmin DEm Declination (J2000)
44- 48 F5.2 arcsec DEs Declination (J2000)
50- 54 I5 km/s HVabs ? Heliocentric velocity obtained through
absorption features
56- 60 I5 km/s HVem ? Heliocentric velocity obtained through
emission features
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Note (1): The WKK identification (Woudt & Kraan-Korteweg, 2001, Cat.
J/A+A/380/441, WKK98 NNNN in Simbad) is given if the galaxy has been
identified by WKK. Alternative names for galaxies are given if a WKK
identification was unavailable but when the galaxy has been identified
already in another survey (e.g. 2MASX J, Skrutskie et al.,
2006AJ....131.1163S 2006AJ....131.1163S). A new identification was given to galaxies not
yet catalogued in the literature, but which we identified from deep
RC imaging (e.g. ZOA J, see Section 4).
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History:
* 16-May-2008: From electronic version of the journal
* 26-Sep-2008: WKK6167 corrected into WKK6177 (from coordinates)
(End) Patricia Vannier [CDS] 24-Apr-2008