The discovery of methanol masers at 107 GHz

Details The discovery of methanol masers at 107 GHz The discovery of methanol masers at 107 GHz

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...294..825v&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 294, no. 3, p. 825-830

Astronomy and Astrophysics

Astrophysics

27

Absorption Spectra, Energy Levels, Interstellar Masers, Methyl Alcohol, Population Inversion, Interstellar Matter, Stimulated Emission

Scientific paper

A new methanol maser line at 107 GHz was discovered in five galactic sources. All of them are known Class 2 methanol masers. Toward Class 1 methanol maser sources, the 107-GHz line was found in absorption, or as rather weak quasi-thermal emission sources. The detection of these new methanol masers supports an assumption that the level population inversion is due to overpopulation of some K ladders relative to neighboring ladders.

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