| Description: | The ASKAP First Large Absorption Survey in HI (FLASH) is a large-area search for neutral hydrogen (HI) in and around distant galaxies at redshift 0.4 < z < 1.0, a cosmic epoch where our knowledge of the HI content of galaxies remains patchy and incomplete.
FLASH has two main science goals: to probe the evolution of the neutral gas content of galaxies, and to investigate gas accretion and feedback processes in active galactic nuclei across a wide range in cosmic time. Radio searches in the HI 21-cm line are unaffected by dust extinction, and FLASH provides one of the first genuine ‘HI-selected’ galaxy samples at intermediate redshift. I will give an update on the current status of the survey (which has so far covered over 6000 square degrees of the southern sky), present some science results from recent papers, and discuss the optical properties of the HI host galaxies. |
