Title: A search for Hα-emitting galaxies at redshift z=0.84
Author(s): Junko Ueda, Takashi Ichikawa, Masaru Kajisawa, Chihiro Tokoku

Abstract:
We present the results of a search for Hα-emitting galaxies at redshift z=0.84. We used very deep near-infrared imaging data taken with the Multi-Object InfraRed Camera and Spectrograph (MOIRCS) on the Subaru Telescope. We observed a 28 arcmin^2 field in the Great Observatories Origins Deep Survey-North (GOODS-N) and used broadband and narrowband filters to investigate emitters. The narrowband filter NB119 is centered at 1.19 μ m, corresponding to Hα at z=0.84. Our data reached J=26.2 and NB119=25.0 (5σ). By analyzing these imaging data, we obtained a few hundreds Hα-emitting galaxies. Then we derived the Hα luminosity function and the star formation rate density. Our data are deeper than previous study, thus we expect to detect fainter objects and estimate a Hα luminosity function at the faint end with high accuracy.