J/MNRAS/458/3083 Abell 3888 galaxies redshifts (Shakouri+, 2016)
An optical analysis of the merging cluster Abell 3888.
Shakouri S., Johnston-Hollitt M., Dehghan S.
<Mon. Not. R. Astron. Soc., 458, 3083-3098 (2016)>
=2016MNRAS.458.3083S 2016MNRAS.458.3083S (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Galaxy catalogs; Redshifts
Keywords: galaxies: clusters: general - galaxies: clusters: individual: A3888 -
galaxies: distances and redshifts
Abstract:
In this paper we present new AAOmega spectroscopy of 254 galaxies
within a 30 arcmin radius around Abell 3888. We combine these data
with the existing redshifts measured in a one degree radius around the
cluster and performed a substructure analysis. We confirm 71 member
galaxies within the core of A3888 and determine a new average redshift
and velocity dispersion for the cluster of 0.1535±0.0009 and
1181±197km/s, respectively. The cluster is elongated along an
East-West axis and we find the core is bimodal along this axis with
two subgroups of 26 and 41 members detected. Our results suggest that
A3888 is a merging system putting to rest the previous conjecture
about the morphological status of the cluster derived from X-ray
observations. In addition to the results on A3888 we also present six
newly detected galaxy overdensities in the field, three of which we
classify as new galaxy clusters.
Description:
Our new observations of the cluster A3888 were taken on the 2013 May 9
and 10 with the AAT in service mode.
We present 254 new redshifts in the region of A3888.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 96 254 Details of the objects observed with the AAOmega
tablea1.dat 51 48 Details of the galaxies of detected galaxy
clusters (Structures 6-8)
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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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1- 2 I2 h RAh Right ascension (J2000)
4- 5 I2 min RAm Right ascension (J2000)
7- 11 F5.2 s RAs Right ascension (J2000)
13 A1 --- DE- Declination sign (J2000)
14- 15 I2 deg DEd Declination (J2000)
17- 18 I2 arcmin DEm Declination (J2000)
20- 24 F5.2 arcsec DEs Declination (J2000)
26- 32 F7.5 --- z Redshift
34- 40 F7.5 --- e_z rms uncertainty on z
42 I1 --- q_z [3/5] Redshift quality flag (1)
44- 90 A47 --- Lines Spectral lines detected
92- 96 F5.2 mag Bmag Blue magnitude from the SuperCOSMOS catalogue
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Note (1): Redshift quality flag as follows:
3 = likely reliable
4 = very reliable (both H and K absorption lines present)
5 = very reliable (H and K and at least one of the other absorption
line (Mg, Na, G, Hδ) present)
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1 I1 --- Struc [6/8] Structure number
3- 18 A16 --- Name Name of the structure (SJD JHHMM.m+DDMM)
20- 21 I2 h RAh Right ascension (J2000)
23- 24 I2 min RAm Right ascension (J2000)
26- 30 F5.2 s RAs Right ascension (J2000)
32 A1 --- DE- Declination sign (J2000)
33- 34 I2 deg DEd Declination (J2000)
36- 37 I2 arcmin DEm Declination (J2000)
39- 43 F5.2 arcsec DEs Declination (J2000)
45- 51 F7.5 --- z Redshift
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 17-Feb-2017