Abstract
In the Hubble Space Telescope Cluster Supernova (SN) Survey (PI:Perlmutter), a large HST program that targeted massive galaxy clusters to find and follow SNe, we discovered a multiply lensed Lyα emitter at z = 3.90 behind the massive cluster WARPS J1415.1+3612 at z = 1.026. Images taken by the Hubble Space Telescope (HST) using ACS reveal a complex lensing system that produces a prominent, highly magnified arc and a triplet of smaller arcs grouped tightly around a cluster member. Spectroscopic observation provides the redshifts for more than 21 cluster members with a velocity dispersion of 807±185 km/s. The mass within the Einstein ring radius corresponds to a central velocity dispersion of 686+15 km/s, consistent with the value estimated from cluster member redshifts. Our mass profile estimate from combining strong lensing and dynamical analyses is in good agreement with both X-ray and weak lensing results. This work has been supported by the Office of Science, U.S. Department of Energy, through contract DE-AC02-05CH11231 and in part by NASA through grants associated with HST-GO-10496.
Original language | English |
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Pages | 461.03 |
Publication status | Published - 1 Jan 2010 |