- ID:
- ivo://CDS.VizieR/J/AJ/123/1216
- Title:
- Redshifts in A3128/A3125
- Short Name:
- J/AJ/123/1216
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- 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).
Number of results to display per page
Search Results
- ID:
- ivo://CDS.VizieR/J/A+A/548/A18
- Title:
- Redshifts in A1413 cluster center
- Short Name:
- J/A+A/548/A18
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We investigate the morphology and dynamics of the massive nearby galaxy cluster Abell 1413. Using wide field imaging and spectroscopic data obtained from observations at the Canada-France-Hawaii Telescope and archival SDSS data, we build a sample of more than 250 galaxies covering a region centered on the cluster and extending to its outskirts on large scales.
- ID:
- ivo://CDS.VizieR/J/AJ/119/44
- Title:
- Redshifts in AWM 7 galaxy cluster
- Short Name:
- J/AJ/119/44
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We have measured 492 redshifts (311 new) in the direction of the poor cluster AWM 7 and have identified 179 cluster members (73 new).
- ID:
- ivo://CDS.VizieR/J/ApJ/634/977
- Title:
- Redshifts in Cl 0024+16 members
- Short Name:
- J/ApJ/634/977
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report results from a panoramic spectroscopic survey of 955 objects in the field of the rich cluster Cl 0024+1654 (z~0.4), complementing the HST imaging presented in the first paper in this series. Combining with previous work, we compile a catalog of 1394 unique redshifts in the field of this cluster (1334 in Table 2), including 486 cluster members spread across an area 10Mpc in diameter. Our new spectroscopic sample includes over 200 high-quality spectra of cluster members. We examine the properties of a large sample of 104 cluster early-type galaxies as a function of cluster radius and local density, using them as sensitive tracers of the various physical processes that may be responsible for galaxy evolution.
- ID:
- ivo://CDS.VizieR/J/A+A/566/A149
- Title:
- Redshifts in LCDCS 0504
- Short Name:
- J/A+A/566/A149
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Constraints on the mass distribution in high-redshift clusters of galaxies are currently not very strong. We aim to constrain the mass profile, M(r), and dynamical status of the z~0.8 LCDCS 0504 cluster of galaxies that is characterized by prominent giant gravitational arcs near its center. Our analysis is based on deep X-ray, optical, and infrared imaging as well as optical spectroscopy, collected with various instruments, which we complemented with archival data. We modeled the mass distribution of the cluster with three different mass density profiles, whose parameters were constrained by the strong lensing features of the inner cluster region, by the X-ray emission from the intracluster medium, and by the kinematics of 71 cluster members.
- ID:
- ivo://CDS.VizieR/J/ApJ/797/106
- Title:
- Redshifts in nine galaxy cluster fields
- Short Name:
- J/ApJ/797/106
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We use dense redshift surveys of nine galaxy clusters at z~0.2 to compare the galaxy distribution in each system with the projected matter distribution from weak lensing. By combining 2087 new MMT/Hectospec redshifts and the data in the literature, we construct spectroscopic samples within the region of weak-lensing maps of high (70%-89%) and uniform completeness.
- ID:
- ivo://CDS.VizieR/J/AJ/130/2012
- Title:
- Redshifts in SARS clusters
- Short Name:
- J/AJ/130/2012
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Southern Abell Redshift Survey (SARS) contains 39 clusters of galaxies with redshifts in the range 0.0<z<0.31 and a median redshift depth of z{bar}=0.0845. SARS covers the region 0deg<delta<-65deg, alpha<5h, alpha>21h (while avoiding the LMC and SMC), with |b|>40{deg}. Cluster locations were chosen from the Abell and Abell-Corwin-Olowin catalogs, while galaxy positions were selected from the Automatic Plate Measuring Facility galaxy catalog with extinction-corrected magnitudes in the range 15<=bJ<19. SARS used the Las Campanas 2.5m du Pont telescope, observing either 65 or 128 objects concurrently over a 1.5deg^2^ field. New redshifts for 3440 galaxies are reported in the fields of these 39 clusters of galaxies.
- ID:
- ivo://CDS.VizieR/J/A+A/532/A57
- Title:
- Redshifts in supercluster SCL 2243-0935
- Short Name:
- J/A+A/532/A57
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- In archival 2.2m MPG-ESO/WFI data we discovered several mass peaks through weak gravitational lensing, forming a possible supercluster at redshift 0.45. Through wide-field imaging and spectroscopy we aim to identify the supercluster centre, confirm individual member clusters, and detect possible connecting filaments. Through multi-colour imaging with CFHT/Megaprime and INT/WFC we identify a population of early-type galaxies and use it to trace the supercluster network. EMMI/NTT multi-object spectroscopy is used to verify the initial shear-selected cluster candidates. We use weak gravitational lensing to obtain mass estimates for the supercluster centre and the filaments.
- ID:
- ivo://CDS.VizieR/J/ApJ/783/52
- Title:
- Redshifts in the field of A383
- Short Name:
- J/ApJ/783/52
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Abell 383 is a famous rich cluster (z=0.1887) imaged extensively as a basis for intensive strong- and weak-lensing studies. Nonetheless, there are few spectroscopic observations. We enable dynamical analyses by measuring 2360 new redshifts for galaxies with r_Petro_{<=}20.5 and within 50' of the Brightest Cluster Galaxy (BCG; R.A._2000_=42.014125{deg},decl._2000_=-03.529228{deg}). We apply the caustic technique to identify 275 cluster members within 7h^-1^Mpc of the hierarchical cluster center. The BCG lies within -11+/-110km/s and 21+/-56 h^-1^kpc of the hierarchical cluster center; the velocity dispersion profile of the BCG appears to be an extension of the velocity dispersion profile based on cluster members. The distribution of cluster members on the sky corresponds impressively with the weak-lensing contours of Okabe et al. especially when the impact of foreground and background structure is included. The values of R_200_=1.22+/-0.01h^-1^Mpc and M_200_=(5.07+/-0.09)x10^14^h^-1^M_{sun}_ obtained by application of the caustic technique agree well with recent completely independent lensing measures. The caustic estimate extends direct measurement of the cluster mass profile to a radius of ~5h^-1^Mpc.
- ID:
- ivo://CDS.VizieR/J/A+A/559/A2
- Title:
- Redshifts in the surroundings of MRC 0156-252
- Short Name:
- J/A+A/559/A2
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the spectroscopic confirmation of a structure of galaxies surrounding the radio galaxy MRC 0156-252 at z=2.02. The structure was initially discovered as an overdensity of both near-infrared selected z>1.6 and mid-infrared selected z>1.2 galaxy candidates. We used the VLT/FORS2 multi-object spectrograph to target ~80 high-redshift galaxy candidates, and obtain robust spectroscopic redshifts for more than half the targets. The majority of the confirmed sources are star-forming galaxies at z>1.5. In addition to the radio galaxy, two of its close-by companions (<6") also show AGN signatures. Ten sources, including the radio galaxy, lie within |z-2.020|<0.015 (i.e., velocity offsets <1500km/s) and within projected 2Mpc comoving of the radio galaxy. Additional evidence suggests not only that the galaxy structure associated with MRC 0156-252 is a forming galaxy cluster but also that this structure is most probably embedded in a larger-scale structure.
