The detection of CH in external galaxies
Abstract
The 3264-MHz transition of CH has been detected in three galaxies (the Large Magellanic Cloud, NGC 4945 and NGC 5128) and possibly in a fourth (NGC 253). The line profiles were similar to those for H2CO. The 3335-MHz transition was detected in one (LMC) and possibly another (NGC 4945). With the exception of NGC 5128, the line/continuum ratios are similar to those in our Galaxy. The results suggest an overabundance of CH relative to H2CO and OH in a molecular cloud in NGC 5128 which is probably located well in front of the nucleus.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- January 1980
- DOI:
- 10.1093/mnras/190.1.17P
- Bibcode:
- 1980MNRAS.190P..17W
- Keywords:
-
- Chemical Composition;
- Galaxies;
- Hydrocarbons;
- Interstellar Chemistry;
- Microwave Spectra;
- Molecular Spectra;
- Line Spectra;
- Magellanic Clouds;
- Milky Way Galaxy;
- Astrophysics