Monoceros R2 - Interactions of a molecular cloud core with a stellar wind?

Details Monoceros R2 - Interactions of a molecular cloud core with a stellar wind? Monoceros R2 - Interactions of a molecular cloud core with a stellar wind?

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...349..529t&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 349, Feb. 1, 1990, p. 529-537. Research supported by SEUI.

Astronomy and Astrophysics

Astrophysics

14

Interstellar Gas, Molecular Clouds, Plasma Interactions, Stellar Winds, Ammonia, H Ii Regions, Molecular Flow

Scientific paper

VLA NH3 (1, 1) and NH3(2, 2) observations toward Monoceros R2 are presented. The high-density gas shows a remarkable clumpy arclike structure, displaced 30 arcsec to the southwest of the edge of the H II region. This arc is apparently part of a 2 arcmin condensation, with its northeastern edge facing the stellar activity center. Within this arc, there is a discernible velocity gradient with the highest velocities away from the stellar activity center. There is also a clear temperature gradient, with the highest temperatures toward the northeastern edge of the arclike structure. These characteristics imply interaction of the exciting source(s) and/or the stellar wind with the ambient dense molecular gas. Several scenarios are proposed to explain the morphology, kinematics, and excitation of the observed ammonia arclike structure, and possible tests to differentiate between the proposed models are suggested.

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