Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...468l.119s&link_type=abstract
Astrophysical Journal Letters v.468, p.L119
Astronomy and Astrophysics
Astronomy
12
Line: Profiles, Ism: Clouds, Ism: Individual Name: Rosette Molecular Complex, Ism: Molecules, Ism: Structure, Radio Lines: General
Scientific paper
We present 12CO and 13CO J = 3 --> 2 and J = 2 --> 1 observations of the Rosette Molecular Complex. The observations show that broad line wings, originally observed in CO J = 1 --> 0, also exist in the higher J lines in high signal-to-noise ratio spectra toward individual positions and in positionally averaged spectra. We show that the wing emission can be explained by the superposition of individual high- and low-velocity clumps, some of which are spatially resolved at high angular resolution, and at least two embedded outflow sources. Our results call in question an earlier interpretation of this weak line wing emission as originating from a low-density, ubiquitous, molecular interclump gas. A multiline analysis implies that the wing emission originates in gas with densities comparable to the density of the bulk emission. We note that the physical conditions derived from this relatively simple single-component excitation analysis do not give a fully consistent picture of these clumps, leaving any conclusion on their dynamical state and evolution rather speculative.
Blitz Leo
Schneider Nicholas
Stutzki Juergen
Winnewisser Gisbert
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