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As a quenching mechanism, AGN feedback could suppress on-going star formationin their host galaxies. On the basis of a sample of galaxies selected fromALFALFA HI survey, the dependence of their HI mass M[HI], stellar mass M[*] &HI-to-stellar mass ratio M[HI]/M[*] on various tracers of AGN activity arepresented and analyzed in this paper. Almost all the AGN-hostings in thissample are gas-rich galaxies, and there is no any evidence to be shown toindicate that the AGN activity could increase/decrease either M[HI] orM[HI]/M[*]. The cold neutral gas can not be fixed positions accurately justbased on available HI data due to the large beam size of ALFALFA survey. Inaddition, even though AGN-hostings are more easily detected by HI surveycompared with absorption line galaxies, these two types of galaxies showsimilar star formation history. If an AGN-hosting would ultimately evolve intoan old red galaxy with few cold gas, then when and how the gas has beenexhausted have to be solved by future hypotheses and observations.

A Statistical Study of H I Gas in Nearby Narrow-Line AGN-Hosting Galaxies