Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...188l...1h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 188, no. 1, Dec. 1987, p. L1-L4.
Astronomy and Astrophysics
Astrophysics
45
Emission Spectra, Intergalactic Media, Interstellar Matter, Line Spectra, Methyl Alcohol, Molecular Clouds, Astronomical Spectroscopy, Microwave Spectra
Scientific paper
The detection of emission in the 96 GHz 2(kappa)-1(kappa) lines of methanol is reported toward the central regions of NGC253 and IC342. A possible detection is also obtained toward NGC6946, while no emission is seen toward M82. (CH3OH)/(H2) abundance ratios appear to be consistent with those determined for galactic sources. The strength of the CH3OH emission, however, is not found to be correlated with infrared or CO luminosities. Toward NGC253, two distinct clouds are identified. One of these appears to be directly associated with the nucleus and remains spatially unresolved. The recently detected H2O maser at 100-150 km/s does not originate from this centrally located cloud.
Henkel Carsten
Jacq Thierry
Mauersberger Rainer
Menten Karl. M.
Steppe H.
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