Detection of H2O maser emission in the galaxy M33.
Abstract
Summary We report the first detection of the 22 GHz water vapor maser in an external galaxy. The 616-523 transition of H2O was detected in the HIl region 1C133 in the galaxy M33 on November 18, 1976. Emission is seen in the heliocentric velocity range -200 to -255 km ; the strongest emission component has a peak flux density of 1.4 Jy which, at a distance of 14 kpc, would have an intensity of 10-15% that of the main line components in W49 during its more quiescent periods. Key words: M33 - H20 maser
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- February 1977
- Bibcode:
- 1977A&A....54..969C
- Keywords:
-
- Galactic Radiation;
- Interstellar Masers;
- Microwave Emission;
- Radio Astronomy;
- Water Masers;
- Flux Density;
- Galactic Rotation;
- High Resolution;
- Hydrogen Clouds;
- Molecular Gases;
- Radio Telescopes;
- Astrophysics