J/A+A/481/593 Radial velocities in A2163 (Maurogordato+, 2008)
A2163: Merger events in the hottest Abell galaxy cluster I.
Dynamical analysis from optical data.
Maurogordato S., Cappi A., Ferrari C., Benoist C., Mars G., Soucail G.,
Arnaud M., Pratt G.W., Bourdin H., Sauvageot J-L.
<Astron. Astrophys. 481, 593 (2008)>
=2008A&A...481..593M 2008A&A...481..593M
ADC_Keywords: Clusters, galaxy ; Redshifts ; Radial velocities
Keywords: galaxies: clusters: general - galaxies: redshifts - catalogues
Abstract:
A2163 is among the richest and most distant Abell clusters,
presenting outstanding properties in different wavelength domains.
X-ray observations have revealed a distorted gas morphology and strong
features have been detected in the temperature map, suggesting that
merging processes are important in this cluster. However, the merging
scenario is not yet well-defined.
We have undertaken a complementary optical analysis, aiming to
understand the dynamics of the system, to constrain the merging
scenario and to test its effect on the properties of galaxies.
We present a detailed optical analysis of A2163 based on new
multicolor wide-field imaging and medium-to-high resolution
spectroscopy of several hundred galaxies.
Description:
Velocity measurements for 512 objects obtained by multiobject
spectroscopy in a field of 30'x30' centered on the galaxy cluster
Abell 2163 are presented. For each object, table1.dat provides the
spectroscopic identification number, right ascension and declination
(J2000.0); radial velocity and the associated error, RTR parameter
(Tonry and Davis, 1981ApJ...246..680T 1981ApJ...246..680T) as an indicator of the goodness
of the cross-correlation redshift, a quality flag for the redshift, a
flag indicating the presence of emission lines, and a flag
corresponding to the instrument used. Objects are sorted by increasing
Right Ascension.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 52 512 Velocity measurements for 512 objects in the
central 30'x30' field of the galaxy cluster
Abell 2163
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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2- 4 I3 --- Seq [1/512] Spectroscopy identification number
6- 7 I2 h RAh Right ascension (J2000.0)
9- 10 I2 min RAm Right ascension (J2000.0)
12- 16 F5.2 s RAs Right ascension (J2000.0)
18 A1 --- DE- Declination sign (J2000.0)
19 I1 deg DEd Declination (J2000.0)
21- 22 I2 arcmin DEm Declination (J2000.0)
24- 27 F4.1 arcsec DEs Declination (J2000.0)
29- 34 I6 km/s RV Radial velocity
36- 38 I3 km/s e_RV Error on radial velocity
40- 43 F4.1 --- RTD RTD parameter (Tonry and Davis,
1981ApJ...246..680T 1981ApJ...246..680T) (1)
46 A1 --- Fz [0/1] Quality flag for RV (0=high) (2)
49 A1 --- Fem [0/1] Emission lines flag (3)
52 I1 --- Run [1/2] Instrument Flag (4)
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Note (1): When RTD>3 the cross-correlation redshift can be considered
as reliable.
Note (2): Quality flag for the redshift is:
0 = high precision velocities
1 = medium precision ones
Note (3): Emission lines flag is:
0 = no emission
1 = emission lines are clearly identified
Note (4): Instrument Flag is:
1 = VIMOS runs at ESO/VLT
2 = MOS run at CFHT
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Acknowledgements: Sophie Maurogordato, sophie.maurogordato(at)oca.eu
(End) Sophie Maurogordato [CNRS, France], Patricia Vannier [CDS] 03-Apr-2008