J/AJ/123/1216 Redshifts in A3128/A3125 (Rose+, 2002)
Multiple merging events in the double cluster A3128/A3125.
Rose J.A., Gaba A.E., Christiansen W.A., Davis D.S., Caldwell N.,
Hunstead R.W., Johnston-Hollitt M.
<Astron. J. 123, 1216 (2002)>
=2002AJ....123.1216R 2002AJ....123.1216R
ADC_Keywords: Clusters, galaxy ; Redshifts
Keywords: galaxies: elliptical and lenticular, cD - galaxies: evolution
Abstract:
Multifiber spectroscopy has been obtained for 335 galaxies in the
field of the double cluster A3128/A3125, using the 2dF multifiber
positioner on the Anglo-Australian Telescope. When combined with
previously published results, a total of 532 objects in the double
cluster now have known redshifts. We have also obtained a 20ks
Chandra ACIS-I image of the central 16'x16' of A3128 and radio imaging
of the cluster with the Molonglo Observatory Synthesis Telescope and
the Australia Telescope Compact Array. The spatial/kinematic
distribution of redshifts in the field of A3128/A3125, when combined
with the Chandra ACIS-I image of A3128, reveals a variety of
substructures present in the galaxy distribution and in the hot
intracluster medium (ICM).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 62 358 Velocity data from 2dF Galaxy Spectra
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See also:
J/A+AS/113/451 : Superclusters of galaxies (Kalinkov+ 1995)
J/MNRAS/269/151 : APM cluster redshift survey (Dalton+, 1994)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [RGC2002] The 2dF catalog reference number
5- 15 A11 --- OID Reference number from previous observations
17- 18 I2 h RAh Hour of Right Ascension (J2000)
20- 21 I2 min RAm Minute of Right Ascension (J2000)
23- 27 F5.2 s RAs Second of Right Ascension (J2000)
29 A1 --- DE- Sign of the Declination (J2000)
30- 31 I2 deg DEd Degree of Declination (J2000)
33- 34 I2 arcmin DEm Arcminute of Declination (J2000)
36- 39 F4.1 arcsec DEs Arcsecond of Declination (J2000)
41- 44 F4.1 mag Bmag The BJ band magnitude
46- 50 I5 km/s cz Radial velocity
52- 53 A2 --- f_cz Lines used for cz (1)
55- 59 F5.1 km/s e_cz The 1 σ error on cz (2)
61 A1 --- Em [yn] Emission line found in spectrum? (3)
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Note (1): Note on cz:
e = velocity was based exclusively on emission lines;
a = velocity was based exclusively on absorption lines;
ae = velocity was based a combination of emission and absorption lines
Note (2): As given by the cross-correlation routine. Note that this
error estimate is invalid for spectra whose velocity determinations
are based on emission lines only.
Note (3): Emission line found in spectrum:
y = yes
n = no
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Table 2: Summary of the radio observations
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Date Frequency Configuration Baseline Pointing center tobs
(MHz) (m) (J2000.0) (hr)
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1991 Dec 03 843 MOST 15-1600 03 30 12.4 -52 33 48 12.0
1999 Feb 28 1384/2496 6C 153-6000 03 31 15.0 -52 41 48 1.67
2000 Mar 23 1384/2496 6D 77-5878 03 31 15.0 -52 41 48 1.15
2000 Nov 04 1384/2496 6D 77-5878 03 31 15.0 -52 41 48 0.65
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 27-May-2002