Gemini/GMOS Spectroscopy of 26 Strong Lensing Selected Galaxy Cluster Cores

Abstract

We present results from a spectroscopic program targeting 26 strong lensing cluster cores that were visually identified in the Sloan Digital Sky Survey (SDSS) and the Second Red-Sequence Cluster Survey (RCS-2). The 26 galaxy cluster lenses span a redshift range of 0.2 < z < 0.65, and our spectroscopy reveals 69 unique background sources with redshifts as high as z=5.200. We also identify redshifts for 262 cluster member galaxies and measure the velocity dispersions and dynamical masses for 18 clusters where we have redshifts for N \geq 10 cluster member galaxies. We include an accounting for the expected biases in dynamical masses of strong lensing selected clusters as predicted by results from numerical simulations and discuss possible sources of bias in our observations. The median dynamical mass of the 18 clusters with N \geq 10 spectroscopic cluster members is M_{Vir} = 7.84 x 10^14 M_sun h_{0.7}^{-1}, which is somewhat higher than predictions for strong lensing selected clusters in simulations. The disagreement is not significant considering the large uncertainty in our dynamical data, systematic uncertainties in the velocity dispersion calibration, and limitations of the theoretical modeling. Nevertheless our study represents an important first step toward characterizing large samples of clusters that are identified in a systematic way as systems exhibiting dramatic strong lensing features.

27 Pages, 13 Figures, 4 Tables, eapj, published in ApJS

References in corpus (15)

• Virial Scaling of Massive Dark Matter Halos: Why Clusters Prefer a High Normalization Cosmology
• The 400 square degrees ROSAT PSPC galaxy cluster survey: Catalog and statistical calibration
• Constraining the Scatter in the Mass-Richness Relation of maxBCG Clusters With Weak Lensing and X-ray Data
• Cross-correlation Weak Lensing of SDSS Galaxy Clusters I: Measurements
• The Cluster Mass Function from Weak Gravitational Lensing
• A New Survey for Giant Arcs
• Strong Lensing in Abell 1703: Constraints on the Slope of the Inner Dark Matter Distribution
• Two New Large Separation Gravitational Lenses from SDSS
• Velocity distributions in clusters of galaxies
• Keck spectroscopic survey of strongly lensed galaxies in Abell 1703: further evidence for a relaxed, unimodal cluster
• The Redshift Distribution of Giant Arcs in the Sloan Giant Arcs Survey
• The Sloan Bright Arcs Survey : Six Strongly Lensed Galaxies at z=0.4-1.4
• Two Lensed Lyman-alpha Emitting Galaxies at z~5
• SDSS J120923.7+264047: A new massive galaxy cluster with a bright giant arc
• Discovery of four gravitational lensing systems by clusters in the SDSS DR6

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• The AGEL Survey: Spectroscopic Confirmation of Strong Gravitational Lenses in the DES and DECaLS Fields Selected Using Convolutional Neural Networks
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