Determination of molecular cloud parameters using thermal methanol lines.

Details Determination of molecular cloud parameters using thermal methanol lines. Determination of molecular cloud parameters using thermal methanol lines.

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...321..311k&link_type=abstract

Astronomy and Astrophysics, v.321, p.311-322

Astronomy and Astrophysics

Astrophysics

19

Ism: Clouds, Ism: Molecules, Ism: Abundances Radio Lines: Ism

Scientific paper

The 2_K_-1_K_ thermal methanol lines near 96 GHz were detected toward 12 regions of massive star formation. Together with the J_0_-J_-1_E lines observed previously, they were used to determine temperature, density, methanol abundance, and some other parameters of interest. Two methods were used to determine the same set of parameters: a simplified analytical method and statistical equilibrium calculations; the results are in satisfactory agreement with each other. The source kinetic temperatures are in the range 15-50K, densities in the range 0.3-5x10^6^cm^-3^, and methanol abundance in the range 4x10^-10^-1.7x10^-7^. Broad wings indicating high-velocity motions were detected toward a number of sources.

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