Three transitions of methanol at 1 CM wavelength

Details Three transitions of methanol at 1 CM wavelength Three transitions of methanol at 1 CM wavelength

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...268..249w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 268, no. 1, p. 249-254.

Astronomy and Astrophysics

Astrophysics

12

Electron Transitions, Emission Spectra, Interstellar Matter, Masers, Methyl Alcohol, Astronomical Spectroscopy, Interstellar Chemistry, Molecular Excitation

Scientific paper

Measurements of the J(k) = 13(2) - 13(1)E (27.471 GHz), the 4(0) - 3(1)E (28.316GHz) and the 8(2) - 9(1)A (28.970GHz) lines of CH3OH with the 100-m telescope are reported; the 13(2) - 13(1)E and 8(2) - 9(1)A- lines have been found for the first time in astronomical sources. The 8(2) - 9(1)A- line is found in emission toward the compact HII region W3 (OH). Presumably this line is produced by maser action. The 4(0) - 3(1)E line is found in absorption. Toward Orion KL, these three lines appear as two blended emission features. The most intense feature is centered between 5 and 10 arcsec south of the Hot Core region. The sizes range from less than 15 to 20 arcsec. The rotational temperature obtained from these results is 100 K, somewhat lower than previously obtained. Weak emission from W51 el/e2 in the 4(0) - 3(1)E line was also detected. For W3 (OH) and Orion KL, the column densities obtained from measurements of the 4(0) - 3(1)E lines exceed the predicted values by more than a factor of two. The excitation of these methanol lines is discussed.

Affiliated with

Also associated with

No associations

Rating

Three transitions of methanol at 1 CM wavelength does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Three transitions of methanol at 1 CM wavelength, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three transitions of methanol at 1 CM wavelength will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1271718