Hydrogen Gas Disk in M33

The distribution of the cold neutral atomic hydrogen gas in the Scd galaxy Messier 33, also known as the "Triangulum Galaxy". Bright regions indicate regions with a high gas density, while dark regions have little or no gas. The underlying stellar disk of this galaxy is not shown, but appears elsewhere in the image gallery. This image emphasizes the wealth of structure present in the gas disk, from tight knots of gas associated with star forming regions, to large holes which may have been swept clean of gas by the winds from massive stars or by exploding supernovae.

The data were obtained from VLA observations taken both in its B-array and CS-array configurations, with a spatial resolution of 10" and velocity resolution of 1.3 km/s. The VLA data have been supplemented by total power observations obtained at the Westerbork Synthesis Radio Telescope.

Legacy Astronomical Images

NRAO/AUI/NSF does not hold full copyright for this image. Contact the archivist for details.

Legacy Astronomical Image

M33

David Thilker, Robert Braun, Rene Walterbos

Very Large Array (VLA)

WSRT

1998-08-15

spectral line

21 cm

1420.4 MHz

HI

RA 1:33:51.020, Dec: 30:39:36.700 (J2000)

1.000000 x 1.000000 degrees

Galaxies Series

Spiral Unit