J/A+A/601/A145 Catalogue of cluster members (Foex+, 2017)
From the core to the outskirts: structure analysis of three massive galaxy
clusters.
Foex G., Chon G., Bohringer H.
<Astron. Astrophys. 601, A145 (2017)>
=2017A&A...601A.145F 2017A&A...601A.145F (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Positional data ; Redshifts
Keywords: galaxies: clusters: individual: RXC J0225.9-4154 -
galaxies: clusters: individual: RXC J0528.9-3927 -
galaxies: clusters: individual: RXC J2308.3-0211 -
X-rays: galaxies: clusters
Abstract:
The hierarchical model of structure formation is a key prediction of
the {LAMBDA} cold dark matter model, which can be tested by studying
the large-scale environment and the substructure content of massive
galaxy clusters. We present here a detailed analysis of the clusters
RXC J0225.9-4154, RXC J0528.9-3927, and RXC J2308.3-0211, as
part of a sample of massive X-ray luminous clusters located at
intermediate redshifts.
We used a multiwavelength analysis, combining WFI photometric
observations, VIMOS spectroscopy, and the X-ray surface brightness
maps. We investigated the optical morphology of the clusters, we
looked for significant counterparts in the residual X-ray emission,
and we ran several statistical tests to assess their dynamical state.
We correlated the results to define various substructure features, to
study their properties, and to quantify their influence on simple
dynamical mass estimators.
RXC J0225.9-4154 has a bi-modal core, and two massive galaxy groups
are located in its immediate surroundings; they are aligned in an
elongated structure that is also detected in X-rays at the 1σ
level. RXC J0528.9-3927 is located in a poor environment; an X-ray
centroid shift and the presence of two central BCGs provide mild
evidence for a recent and active dynamical history. RXC J2308.3-0211
has complex central dynamics, and it is found at the core of a
superstes-cluster.
The complexity of the cluster's central dynamics reflects the
richness of its large-scale environment: RXC J0225 and RXC J2308
present a mass fraction in substructures larger than the typical
5-15%, whereas the isolated cluster RXC J0528 does not have any
major substructures within its virial radius. The largest
substructures are found in the cluster outskirts. The optical
morphology of the clusters correlates with the orientation of their
BCG, and with the position of the main axes of accretion.
Description:
Photometric and spectroscopic redshifts of the cluster members for
RXCJ0225.9-4154, RXCJ0528.9-3927, and RXCJ2308.3-0211. When a
spectroscopic redshift is available, the photometric value is the
same. In addition, we provide a quality flag for the spectroscopic
redshift and an uncertainty on the photometric estimate. We also
provide a red-sequence membership flag. Spectroscopic redshifts have a
typical uncertainty of 250-300km/s.
Objects:
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RA (2000) DE Designation(s)
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02 25 22 -42 00.5 RXCJ0225 = RXC J0225.9-4154
05 28 56.2 -39 27 49 RXCJ0528 = RXC J0528.9-3927
23 08 22.3 -02 11 29 RXCJ2308 = RXC J2308.3-0211
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 52 4104 Position and redshift of 4104 galaxies in
three galaxy clusters
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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- 8 A8 --- Cluster Cluster name (shortname)
10- 11 I2 h RAh Right ascension (J2000.0)
13- 14 I2 min RAm Right ascension (J2000.0)
16- 19 F4.1 s RAs Right ascension (J2000.0)
21 A1 --- DE- Declination sign (J2000.0)
22- 23 I2 deg DEd Declination (J2000.0)
25- 26 I2 arcmin DEm Declination (J2000.0)
28- 31 F4.1 arcsec DEs Declination (J2000.0)
33- 38 F6.4 --- zspec ? Spectroscopic redshift
40 I1 --- EZflag [0/4]? EZ (Easy redshift) quality flag (1)
42- 45 F4.2 --- zphot ? Photometric redshift
47- 50 F4.2 --- e_zphot ? rms uncertainty on photometric redshift
52 A1 --- RSflag [0/1] Red-sequence membership flag (2)
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Note (1): EZ flag from 0 (solution is not reliable) to 4
(solution is highly reliable).
Note (2): Red-sequence membership flag as follows:
1 = galaxy belongs to the cluster red sequence
0 = galaxy does not belong to the cluster red sequence
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Acknowledgements:
Gael Foex, foex.gael(at)gmail.com
(End) Gael Foex [MPE, Germany], Patricia Vannier [CDS] 08-Mar-2017