Classification and list of transitions of, and observation prospects for, extragalactic methanol masers

Details Classification and list of transitions of, and observation prospects for, extragalactic methanol masers Classification and list of transitions of, and observation prospects for, extragalactic methanol masers

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993astl...19..293s&link_type=abstract

Astronomy Letters, Vol. 19, p. 293-298; Pis'ma v Astronomicheskij Zhurnal (ISSN 0320-0108), vol. 19, no. 8, p. 725-736. In Russ

Astronomy and Astrophysics

Astronomy

8

Electron Transitions, H Ii Regions, Interstellar Masers, Methyl Alcohol, Molecular Clouds, Classifications, Maser Outputs, Statistical Analysis

Scientific paper

A new classification of methanol masers based on different types of maser sources is proposed. A division into two broad classes, with the designations of the generally accepted classification taken into account, is suggested. Class I consists of GMCs and their large-scale fragments and clumps comprising GCM hot cores. Class II contains sources connected with the boundaries of compact HII regions. Results of statistical equilibrium calculations for methanol masers as well as regularities of torsional pumping of Class II masers are considered. It is shown that the most promising observations, from the standpoint of the search for extragalactic methanol masers, are those of starburst galaxies in the 4(-1)-3(0)E and 5(-1)-4(0)E lines.

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