Observations of interstellar methanol with the 14-m Yebes radiotelescope

Details Observations of interstellar methanol with the 14-m Yebes radiotelescope Observations of interstellar methanol with the 14-m Yebes radiotelescope

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991azh....68..456v&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 68, May-June 1991, p. 456-465. In Russian.

Astronomy and Astrophysics

Astronomy

1

Interstellar Masers, Interstellar Matter, Line Spectra, Methyl Alcohol, Radio Telescopes, Hydroxyl Radicals, Stellar Envelopes, Thermal Emission, Water

Scientific paper

Observations are presented of the 7(0)-6(1) and 1(0)-0(0) lines of CH2OH A(+) near 7 mm. Observations in those two lines are combined in order to distinguish between maser and thermal emission components. Maser features in the 7(0)-6(1) A(+) line were detected in DR 21 (OH), W 51 M and Sgr A-A; no maser action was seen toward Ori-KL and Sgr B2. Thermal emission was observed in both lines toward all those sources, making it possible to determine the CH3OH column densities. The CH3OH abundance (relative to H2) in those sources is estimated to be about 10 to the -7th.

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