Title

Hubble Space Telescope Discovery of a z = 3.9 Multiply Imaged Galaxy Behind the Complex Cluster Lens WARPS J1415.1+36 at z = 1.026

Authors

Xiaosheng Huang, University of San FranciscoFollow
T Morokuma
HK Fakhouri
G Aldering
R Amanullah
K Barbary
M Brodwin
NV Connolly
KS Dawson
M Doi
L Faccioli
V Fadeyev
AS Fruchter
G Goldhaber
MD Gladders
JF Hennawi
Y Ihara
MJ Jee
M Kowalski
K Konishi
C Lidman
J Meyers
LA Moustakas
S Perlmutter
D Rubin
DJ Schlegel
AL Spadafora
N Suzuki
N Takanashi
N Yasuda

Document Type

Article

Publication Date

2009

Abstract

We report the discovery of a multiply lensed Ly Alpha (Lya) emitter at z = 3.90 behind the massive galaxy 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 spectroscopically confirmed cluster member. Spectroscopic observations using FOCAS on Subaru confirm strong Lya emission in the source galaxy and provide redshifts for more than 21 cluster members, from which we obtain a velocity dispersion of 807+/-185 km/s. Assuming a singular isothermal sphere profile, the mass within the Einstein ring (7.13+/-0.38") corresponds to a central velocity dispersion of 686+15-19 km/s for the cluster, 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.

Comments

Copyright 2009 American Astronomical Society.

Published article available at: http://dx.doi.org/10.1088/0004-637X/707/1/L12

DOI

10.1088/0004-637X/707/1/L12

Recommended Citation

X. Huang, et al. Hubble Space Telescope Discovery of a z = 3.9 Multiply Imaged Galaxy Behind the Complex Cluster Lens WARPS J1415.1+36 at z = 1.026. 2009 Astrophysical Journal. 707 L12 doi:10.1088/0004-637X/707/1/L12