Detecting population III galaxies with HST and JWST
  A small fraction of the atomic-cooling halos assembling at z<15 may form out
of minihalos that never experienced any prior star formation, and could in
principle host small galaxies of chemically unenriched stars. Since the
prospects of detecting isolated population III stars appear bleak even with the
upcoming James Webb Space Telescope (JWST), these population III galaxies may
offer one of the best probes of population III stars in the foreseeable future.
By projecting the results from population III galaxy simulations through
cluster magnification maps, we predict the fluxes and surface number densities
of pop III galaxy galaxies as a function of their typical star formation
efficiency. We argue that a small number of lensed population III galaxies in
principle could turn up at z=7-10 in the ongoing Hubble Space Telescope survey
CLASH, which covers a total of 25 low-redshift galaxy clusters.
