The Hydrogen Gas Disk in M33

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About this Image

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.

Investigator(s):  David Thilker, Robert Braun, and Rene Walterbos

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Technical Data

    Telescope VLA 
    Date of Observation 1998-08-15 
    Type of Observation Spectral Line Observations 
    Wavelength 21 cm 
    Frequency 1420.4 MHz 
    Species HI 
    Center of Image RA: 01:33:51.02, Dec: 30:39:36.70 (J2000)  
    Field of View 1.0000 x 1.0000 degrees  
    Technical Caption 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.  

  • Astronomical database entries for M33
    • Query NED for images of M33
    • Query SIMBAD for more M33 data


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