by Bärbel Koribalski (CASS)

Inspired by yesterday’s ADAP of the Magnetic and gaseous spiral arms in M83 (Frick et al. 2015), here we show its neutral hydrogen distribution. – (Left) Large-scale moment-0 map of the extended HI gas distribution, constructed from mosaic data obtained with both the 21-cm multibeam system on the 64-m Parkes dish and the Australia Telescope Compact Array (ATCA). – (Right) ATCA high-resolution HI moment-0 map (red contours) overlaid onto the WISE 12 micron map (grey-scale, log-stretch) of the central disk (denoted with a grey box in the left panel). The HI contour levels are 0.1, 0.27, 0.43 and 0.6 Jy/beam km/s. The ATCA beam is approx. 10 arcsec. – Reference: Figure 14 in Constructing a WISE High Resolution Galaxy Atlas by Jarrett et al. (2012) .