Oral Presentation

HIghMass - High HI Mass, HI rich Galaxies at z~0

Author(s): Shan Huang

Presenter: Shan Huang (ASIAA)

We present the first results of the study of a set of exceptional HI sources identified in the 40% ALFALFA extragalactic HI survey catalog as being both HI massive and having high gas fractions for their stellar masses: the HIghMass galaxy sample. We analyze UV- and optical- broadband and Hα images to understand the nature of their relatively underluminous disks in optical and to test whether their high gas fractions can be tracked to higher dark matter halo spin parameters or late gas accretion.