Interpretation of type I OH maser sources
Abstract
OH maser sources of type I, which are related to regions of star formation, have been known for more than a decade. However, despite great effort no satisfactory theoretical interpretation has yet been given. A model for the interpretation of type I OH maser sources is suggested here. This model combines the effect of velocity and magnetic field gradients with radiative pumping by means of the (2 Pi 3/2, J equals 5/2 to 2 Pi 1/2, J equals 5/2) transition. Due to an overlap of particular hyperfine components, inversion of the 1665 MHz line is favored.
- Publication:
-
Nature
- Pub Date:
- July 1980
- DOI:
- 10.1038/286136a0
- Bibcode:
- 1980Natur.286..136K
- Keywords:
-
- Hydroxyl Radicals;
- Interstellar Masers;
- Electron Transitions;
- Hyperfine Structure;
- Infrared Radiation;
- Molecular Spectra;
- Pumping;
- Astrophysics;
- HYDROXYL RADICALS;
- INTERSTELLAR MASERS;
- ELECTRON TRANSITIONS;
- HYPERFINE STRUCTURE;
- INFRARED RADIATION;
- MOLECULAR SPECTRA;
- PUMPING