Hydrogen Gas Disk in M33

https://www.nrao.edu/archives/plugins/Dropbox/files/m33monored.jpg

Description

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.

Creator

Legacy Astronomical Images

Rights

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

Type

Legacy Astronomical Image

Object Name

M33

Investigators

David Thilker, Robert Braun, Rene Walterbos

Telescope

Very Large Array (VLA)
WSRT

Observation Date

1998-08-15

Type of Observation

spectral line

Wavelength

21 cm

Frequency

1420.4 MHz

Species

HI

Center of Image

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

Field of View

1.000000 x 1.000000 degrees

Link to NRAO Newsletter article

Series

Galaxies Series

Unit

Spiral Unit

Citation

Legacy Astronomical Images, “Hydrogen Gas Disk in M33,” NRAO Archives, accessed December 3, 2021, https://www.nrao.edu/archives/items/show/33564.