TY - JOUR
T1 - MUSE spectroscopy and deep observations of a unique compact JWST target, lensing cluster CLIO
AU - Griffiths, Alex
AU - Conselice, Christopher J.
AU - Alpaslan, Mehmet
AU - Frye, Brenda L.
AU - Diego, Jose M.
AU - Zitrin, Adi
AU - Yan, Haojing
AU - Ma, Zhiyuan
AU - Barone-Nugent, Robert
AU - Bhatawdekar, Rachana
AU - Driver, Simon P.
AU - Robotham, Aaron S.G.
AU - Windhorst, Rogier A.
AU - Wyithe, J. Stuart B.
N1 - Publisher Copyright:
© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.
PY - 2018/4/1
Y1 - 2018/4/1
N2 - We present the results of a VLT MUSE/FORS2 and Spitzer survey of a unique compact lensing cluster CLIO at z = 0.42, discovered through the GAMA survey using spectroscopic redshifts. Compact and massive clusters such as this are understudied, but provide a unique prospective on dark matter distributions and for finding background lensed high-z galaxies. The CLIO cluster was identified for follow-up observations due to its almost unique combination of high-mass and dark matter halo concentration, as well as having observed lensing arcs from ground-based images. Using dual band optical and infra-red imaging from FORS2 and Spitzer, in combination with MUSE optical spectroscopy we identify 89 cluster members and find background sources out to z = 6.49. We describe the physical state of this cluster, finding a strong correlation between environment and galaxy spectral type. Under the assumption of an NFW profile, we measure the total mass of CLIO to be M200 = (4.49 ± 0.25) × 1014 M. We build and present an initial strong-lensing model for this cluster, and measure a relatively low intracluster light (ICL) fraction of 7.21 ± 1.53 per cent through galaxy profile fitting. Due to its strong potential for lensing background galaxies and its low ICL, the CLIO cluster will be a target for our 110 h James Webb Space Telescope 'Webb Medium-Deep Field' (WMDF) GTO program.
AB - We present the results of a VLT MUSE/FORS2 and Spitzer survey of a unique compact lensing cluster CLIO at z = 0.42, discovered through the GAMA survey using spectroscopic redshifts. Compact and massive clusters such as this are understudied, but provide a unique prospective on dark matter distributions and for finding background lensed high-z galaxies. The CLIO cluster was identified for follow-up observations due to its almost unique combination of high-mass and dark matter halo concentration, as well as having observed lensing arcs from ground-based images. Using dual band optical and infra-red imaging from FORS2 and Spitzer, in combination with MUSE optical spectroscopy we identify 89 cluster members and find background sources out to z = 6.49. We describe the physical state of this cluster, finding a strong correlation between environment and galaxy spectral type. Under the assumption of an NFW profile, we measure the total mass of CLIO to be M200 = (4.49 ± 0.25) × 1014 M. We build and present an initial strong-lensing model for this cluster, and measure a relatively low intracluster light (ICL) fraction of 7.21 ± 1.53 per cent through galaxy profile fitting. Due to its strong potential for lensing background galaxies and its low ICL, the CLIO cluster will be a target for our 110 h James Webb Space Telescope 'Webb Medium-Deep Field' (WMDF) GTO program.
KW - galaxies: clusters: general
KW - gravitational lensing: strong
KW - techniques: imaging spectroscopy
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U2 - 10.1093/mnras/stx3364
DO - 10.1093/mnras/stx3364
M3 - Article
AN - SCOPUS:85094522283
SN - 0035-8711
VL - 475
SP - 2853
EP - 2869
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 3
ER -