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11 papers · 2 filters
CLASH: Discovery of a Bright z~6.2 Dwarf Galaxy Quadruply Lensed by MACS J0329.6-0211
A. Zitrin, J. Moustakas, L. Bradley +22
We report the discovery of a z_{phot}=6.18^{+0.05}_{-0.07} (95% confidence level) dwarf galaxy, lensed into four images by the galaxy cluster MACS J0329.6-0211 (z_{l}=0.45). The ga…
CLASH: New Multiple-Images Constraining the Inner Mass Profile of MACS J1206.2-0847
A. Zitrin, P. Rosati, M. Nonino +45
We present a strong-lensing analysis of the galaxy cluster MACS J1206.2-0847 (=0.44) using UV, Optical, and IR, HST/ACS/WFC3 data taken as part of the CLASH multi-cycle treasury…
A Precise Cluster Mass Profile Averaged from the Highest-Quality Lensing Data
Keiichi Umetsu, Tom Broadhurst, Adi Zitrin +3
We outline our methods for obtaining high precision mass profiles, combining independent weak-lensing distortion, magnification, and strong-lensing measurements. For massive cluste…
Profiles of Dark Matter Velocity Anisotropy in Simulated Clusters
Doron Lemze, Rick Wagner, Yoel Rephaeli +6
We report statistical results for dark matter (DM) velocity anisotropy, β, from a sample of some 6000 cluster-size halos (at redshift zero) identified in a ΛCDM hydrodynamical adap…
The Universal Einstein Radius Distribution from 10,000 SDSS Clusters
Adi Zitrin, Tom Broadhurst, Matthias Bartelmann +5
We present results from strong-lens modelling of 10,000 SDSS clusters, to establish the universal distribution of Einstein radii. Detailed lensing analyses have shown that the inne…
Through the Looking Glass: Bright, Highly Magnified Galaxy Candidates at z~7 Behind Abell 1703
L. D. Bradley, R. J. Bouwens, A. Zitrin +7
We report the discovery of seven strongly lensed Lyman break galaxy (LBG) candidates at z~7 detected in Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) imaging of Abell 170…