The ELG target selection with the BOSS survey
  The Baryon Acoustic Oscillation (BAO) feature in the power spectrum of
galaxies can be used as a standard ruler to probe the accelerated expansion of
the Universe. In this paper, we study several galaxy selection schemes aiming
at building an emission-line galaxy (ELG) sample in the redshift range $0.6 < z
< 1.7$, that would be suitable for future BAO studies using the Baryonic
Oscillation Spectroscopic Survey (BOSS) spectrograph on the Sloan Digital Sky
Survey (SDSS) telescope. We explore two different color selections using both
the SDSS and the Canada-France-Hawaii Telescope Legacy Survey (CFHTLS)
photometry in the $u, g, r, i$ bands and evaluate their performance for
selecting bright ELG. This study confirms the feasibility of massive ELG
surveys using the BOSS spectrographs on the SDSS telescope for a BAO detection
at redshift $z\sim1$, in particular for the proposed eBOSS experiment.
