Searching for z => 7 Galaxies using Narrow-Band Imaging.

Pascale Hibon (ASU)

The Ly-alpha luminosity function of high-redshift Ly-alpha emitters (LAEs) is one of the
few observables of the re-ionization epoch accessible to date with 8-10 m class telescopes. The evolution with redshift allows one to constrain the evolution of LAEs and their role in re-ionizing the Universe at the end
of the Dark Ages. During this talk, I will explain which method I used to perform a search of high redshift LAEs.
We have performed a narrow-band imaging program at 1.06 microns at the CFHT, targeting Ly-alpha emitters at redshift z ~ 7.7 in the CFHT-LS D1 field. From these observations we have derived a photometric sample of 7 LAE
candidates at z~ 7.7 and a first possible Ly-alpha luminosity function at z~7.7.