SIMBAD references

2004A&A...422..573L - Astronomy and Astrophysics, volume 422, 573-585 (2004/8-1)

Methanol as a diagnostic tool of interstellar clouds. I. Model calculations and application to molecular clouds.

LEURINI S., SCHILKE P., MENTEN K.M., FLOWER D.R., POTTAGE J.T. and XU L.-H.

Abstract (from CDS):

We present a detailed analysis of the diagnostic properties of methanol, (CH3OH), in dense molecular clouds, made possible by the availability of new (CH3OH-He) collisional rate coefficients. Using a spherical Large Velocity Gradient (LVG) model, the dependence on kinetic temperature and spatial density of various millimeter and submillimeter line bands is investigated over a range of physical parameters typical of high- and low-mass star-forming regions. We find CH3OH to be a good tracer of high-density environments and sensitive to the kinetic temperature. Using our LVG model, we have also developed an innovative technique to handle the problem of deriving physical parameters from observed multi-line spectra of a molecule, based on the simultaneous fit of all the lines with a synthetic spectrum, finding the best physical parameters using numerical methods.

Abstract Copyright:

Journal keyword(s): ISM: molecules - ISM: clouds - molecular processes

Simbad objects: 3

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