On the influence of dust on the effectiveness of OH maser sources

Details On the influence of dust on the effectiveness of OH maser sources On the influence of dust on the effectiveness of OH maser sources

Nov 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975a%26a....44...95k&link_type=abstract

Astronomy and Astrophysics, vol. 44, no. 1, Nov. 1975, p. 95-100. Research sponsored by the Deutsche Forschungsgemeinschaft.

Astronomy and Astrophysics

Astrophysics

4

Cosmic Dust, Hydroxyl Emission, Interstellar Masers, Astronomical Models, Infrared Radiation, Interstellar Matter, Line Spectra, Mathematical Models, Optical Thickness, Population Inversion

Scientific paper

The influence of continuous absorption by dust on the efficiency of OH maser sources is investigated. This influence is an indirect one acting on the infrared lines which connect the maser levels with the higher lying states. It is shown by means of a three level model that under certain conditions population inversion is possible even in regions which are optically thick in the infrared line, which is in contrast to the case of no continuous absorption. The maser condition in this case depends on the intensity in the maser line itself. It is satisfied easier for large intensities than for low ones.

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