12.2 GHz CH3OH Absorption in Southern Molecular Clouds
1991 ◽
Vol 9
(2)
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pp. 287-288
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AbstractWe have used the Parkes 64m telescope to observe the 20 → 3−1E absorption of CH3 OH at 12.2 GHz towards 58 Galactic H II regions and dark clouds, yielding 38 detections. The results show that CH3 OH absorbing clouds have a typical optical depth of 0.25 and a column density of 8.4 × 1015 cm−2. CH3 OH absorption is often accompanied by unsaturated maser emission and is closely associated with background H II regions. CH3 OH absorption against the 2.7 K background is also observed in several dark clouds.
1992 ◽
Vol 10
(2)
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pp. 113-117
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1989 ◽
Vol 120
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pp. 511-517
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1991 ◽
Vol 147
◽
pp. 37-40
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2018 ◽
Vol 614
◽
pp. A111
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1987 ◽
Vol 115
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pp. 499-499
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Keyword(s):
2019 ◽
Vol 489
(4)
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pp. 4497-4512
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