Detection of a new type of methanol maser

Details Detection of a new type of methanol maser Detection of a new type of methanol maser

May 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...134l...7w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 134, no. 1, May 1984, p. L7-L10.

Astronomy and Astrophysics

Astrophysics

47

Interstellar Masers, Methyl Alcohol, Molecular Clouds, Orion Nebula, Absorption Spectra, Brightness Temperature, H Ii Regions, Line Spectra, Radiant Flux Density

Scientific paper

The discovery of emission and absorption at 23121 MHz, attributed to the 92 - 101 A+ transition of methanol (CH3OH) is reported. The emission lines are from W3(OH), Orion-KL, and NGC 7538-IRS1; absorption was found toward the compact H II region in W31. Negative results for a number of other regions are given. The emission from W3(OH) is caused by maser amplification of the background continuum source. Maser amplification probably also explains the observed emission from NGC 7538-IRS1. The 92 - 101 A+ maser emission is the first detected from the A symmetry state of methanol and the first methanol maser found outside of Orion-KL.

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