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3rd of June 2015
The Bluedisks project: a study of unusually HI-rich galaxies
by Jing Wang (CASS)
The Bluedisk project (Wang et al. 2012, 2013) with the Westerbork Synthesis Radio Telescope (WSRT) has mapped the HI in a sample of 23 low-redshift galaxies with unusually high HI mass fractions, along with a similar-sized sample of control galaxies. The aim is to investigate the link between cold gas accretion and galactic disk formation in the Local Universe. The advantage of the sample is that all the target galaxies lie beyond a luminosity distance of 100 Mpc, and we fully sample the HI environment within a projected distance of ~1 Mpc (with the ~1 deg primary beam) and systematic velocity of more than ±500 km/s around the target galaxies. A good database to perform pilot experiments for the large volume that will be detected by WALLABY!

The image above shows multi-color optical images of four Bluedisks galaxies from the Sloan Digital Sky Survey (SDSS) overlaid with HI column density contours.

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