- ID:
- ivo://CDS.VizieR/J/A+A/601/A145
- Title:
- Catalogue of cluster members
- Short Name:
- J/A+A/601/A145
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- 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 1{sigma} 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.
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Search Results
- ID:
- ivo://CDS.VizieR/VII/186
- Title:
- Catalogue of Galaxies in A3744
- Short Name:
- VII/186
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This catalogue contains the positions and radial velocities of 47 galaxies.
- ID:
- ivo://CDS.VizieR/J/A+A/393/439
- Title:
- Catalogue of galaxies towards Abell 496
- Short Name:
- J/A+A/393/439
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We have derived the galaxy luminosity function (GLF) in the cluster of galaxies Abell 496 from a wide field image in the I band. A single Schechter function reproduces quite well the GLF in the 17<=I_AB_<=22 (-19.5<=M_I_<=eq-14.5) magnitude interval, and the power law index of this function is found to be somewhat steeper in the outer regions than in the inner regions. This result agrees with the idea that faint galaxies are more abundant in the outer regions of clusters, while in the denser inner regions they have partly been accreted by larger galaxies or have been dimmed or even disrupted by tidal interactions.
- ID:
- ivo://CDS.VizieR/VII/159
- Title:
- Catalogue of galaxies towards the Coma Supercluster
- Short Name:
- VII/159
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- (Summary of the paper) The existence of a filament of galaxies was shown by Fontanelli (1984) in the Coma cluster region. This paper concerns the study of a IIIaJ Palomar Schmidt plate of the Eastern end of this filament. We have developed a real time reduction technique, quite similar to that used for the COSMOS machine and performed, in real time, an image segmentation. The galaxy selection was made using a classical Bayesian classification based on the diagram of the integrated density versus the area. All the non-stellar objects were thus identified using the PDS and a morphological type was attributed to the galaxies. Our catalogue gives coordinates, magnitudes (derived from the Zwicky et al. (1961-68) and Nilson (1973) catalogues), area in pixels, and morphological types for 7582 galaxies. A histogram of all the galaxy magnitudes shows that the catalogue is apparently complete down to about the 19th magnitude. The asymmetry in the distribution of the bright objects between the North-West and the South-East part of the plate found by Fontanelli (1984) is also present for the fainter objects of our catalogue. We have identified galaxy condensations using an image segmentation on the galaxy density map. The parameters, position, axis, and orientation of these condensations have been estimated.
- ID:
- ivo://CDS.VizieR/VII/170
- Title:
- Catalogue of Southern Peculiar Galaxies and Associations
- Short Name:
- VII/170
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This "Catalogue of Southern Peculiar Galaxies and Associations" is a complete and detailed catalogue of all the most interesting galaxies and most striking apparent associations of galaxies in the Southern sky. The printed catalogue is made of two volumes: Volume I which lists the Peculiar Galaxies, and Volume II which contains photographs of galaxies which are representative of the various Categories used in the Classification scheme presented in Volume I.
- ID:
- ivo://CDS.VizieR/J/A+A/606/A122
- Title:
- Catalogue of X-ray luminous clusters members
- Short Name:
- J/A+A/606/A122
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A robust determination of galaxy cluster mass is crucial to use them as cosmological probes, or to study the physics governing their formation and evolution. Applying various estimators on well-defined cluster samples is a mandatory step in characterising their respective systematics. Our main goal is to compare the results of three dynamical mass estimators to the X-ray hydrostatic values. Here we focus on massive galaxy clusters at intermediate redshifts z~0.3. We estimated dynamical masses with the virial theorem, the Jeans equation, and the caustic method using wide-field VIMOS spectroscopy; the hydrostatic masses were obtained previously from XMM-Newton observations.We investigated the role of colour selection and the impact of substructures on the dynamical estimators.
- ID:
- ivo://CDS.VizieR/J/A+A/285/785
- Title:
- 3C 295 BRri photometry
- Short Name:
- J/A+A/285/785
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We observed the cluster Cl 1409+524 (z=0.46) with an imaging Fabry-Perot interferometer. A sequence of Fabry-Perot images (FWHM=1.0-1.3nm) was used to search for redshifted [OII]{lambda}372.7nm- and [OIII]{lambda}500.7nm line emission. We studied 144 galaxies up to a limiting continuum R-band magnitude of 22.5mag within 1 Mpc around the cluster center. Previously known emission-line galaxies in the cluster were confirmed and 17 new members with emission lines were found. Their star formation rate of 1-2M_{sun}_/yr is typical for normal spirals. We have imaged the cluster with broad band B, R and seven intermediate band filters (FWHM=10.0-20.0nm) in order to derive low-resolution spectral energy distributions of cluster galaxies. These were fitted by template spectra to estimate Hubble class and redshifts. Based on this decomposition, we derived a percentage of emission-line galaxies of 40+/-11%.
- ID:
- ivo://CDS.VizieR/J/A+A/644/A107
- Title:
- 3C 129 candidate cluster galaxies
- Short Name:
- J/A+A/644/A107
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a catalogue of 261 new infrared selected members of the 3C 129 galaxy cluster. The cluster, located at z=0.02, forms part of the Perseus-Pisces filament and is obscured at optical wavelengths due to its location in the zone of avoidance. We identified these galaxies using the J- and K-band imaging data provided by the UKIDSS Galactic Plane Survey within an area with a radius of 1.1{deg} centred on the X-ray emission of the cluster at (l, b) = (160.52{deg}, 0.27{deg}). A total of 26 of the identified galaxy members have known redshifts 24 of which are from our 2016 Westerbork HI survey and two are from optical spectroscopy. An analysis of the galaxy density at the core of the 3C 129 cluster shows it to be less dense than the Coma and Norma clusters, but comparable to the galaxy density in the core of the Perseus cluster. From an assessment of the spatial and velocity distributions of the 3C 129 cluster galaxies that have redshifts, we derived a velocity of cz=5227+/-171km/s and=1097+/-252km/s for the main cluster, with a substructure in the cluster outskirts at cz=6923+/-71km/s with {sigma}=422+/-100km/s. The presence of this substructure is consistent with previous claims based on the X-ray analysis that the cluster is not yet virialised and may have undergone a recent merger.
- ID:
- ivo://CDS.VizieR/J/MNRAS/273/1097
- Title:
- CCD photometry for E and S0 galaxies
- Short Name:
- J/MNRAS/273/1097
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- CCD surface photometry for 232 E and S0 galaxies is presented. The galaxies are observed in Gunn r and Johnson B, or Gunn r and g. For 48 of the galaxies also surface photometry in Johnson U is presented. Aperture magnitudes in Gunn v are derived for half of the galaxies. Galaxies in the following clusters have been observed: Abell 194, Abell 539, Abell 3381, Abell 3574, Abell S639, Abell S753, HydraI (Abell 1060), DC2345-28, Doradus, and Grm15. This catalog include the global parameters for the galaxies: effective radius, mean surface brightness, the characteristic radius r_n, colour, colour gradient, ellipticity, c4, <c4>, and <c6>. The derivation of the effective parameters and of r_n takes the seeing into account. Seeing corrected values of the effective parameters and r_n are given for 147 E and S0 galaxies in the Coma cluster. This catalog also includes colours, colour gradients, ellipticity, c4, <c4>, and <c6> for the galaxies in the Coma cluster. This is an slightly updated version of data published in Jorgensen et al. (1992A&AS...95..489J) and Jorgensen & Franx (1994ApJ...433..553J). Colours and ellipticities are derived for the values effective radii in Gunn r where the seeing has been taken into account.
- ID:
- ivo://CDS.VizieR/J/A+AS/107/277
- Title:
- CCD photometry of Abell clusters
- Short Name:
- J/A+AS/107/277
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- (no description available)
