MUSE spectroscopy and deep observations of a unique compact JWST target, lensing cluster CLIO Academic Article uri icon

abstract

  • 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 …

publication date

  • January 1, 2018