1 research outputs found
The HI in Ring Galaxies Survey (HI-RINGS) -- Effects of the bar on the HI gas in ring galaxies
We present a new high-resolution neutral atomic hydrogen (HI) survey of ring
galaxies using the Australia Telescope Compact Array (ATCA). We target a sample
of 24 ring galaxies from the Buta (1995) Southern Ring Galaxy Survey Catalogue
in order to study the origin of resonance-, collisional- and interaction-driven
ring galaxies. In this work, we present an overview of the sample and study
their global and resolved HI properties. In addition, we also probe their star
formation properties by measuring their star formation rates (SFR) and their
resolved SFR surface density profiles. We find that a majority of the barred
galaxies in our sample are HI deficient, alluding to the effects of the bar in
driving their HI deficiency. Furthermore, for the secularly evolving barred
ring galaxies in our sample, we apply Lindblad's resonance theory to predict
the location of the resonance rings and find very good agreement between
predictions and observations. We identify rings of HI gas and/or star formation
co-located at one or the other major resonances. Lastly, we measure the bar
pattern speed () for a sub-sample of our galaxies and
find that the values range from 10 -- 90 km s kpc, in good
agreement with previous studies.Comment: Accepted for publication in PAS