Evidence for large-scale expanding motions within the Orion A molecular cloud

Details Evidence for large-scale expanding motions within the Orion A molecular cloud Evidence for large-scale expanding motions within the Orion A molecular cloud

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...395l..99h&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 395, no. 2, Aug. 20, 1992, p. L99-L102.

Other

23

Emission Spectra, Molecular Clouds, Orion Nebula, Star Formation, Carbon Monoxide, Stellar Envelopes, Stellar Winds

Scientific paper

Images of the Orion A molecular cloud constructed from spectra of (C - 12)O J = 1 - 0 emission observed with the FCRAO 14 m antenna are presented. An inspection of the kinematics of the Orion A cloud reveals several regions with large-scale expanding motions manifest by nearly circular emission features with radii 10 - 26 arcmin (1.0 - 2.6 pc) and secondary velocity components which are shifted 2 - 3 km/s from the ambient cloud velocity. The presence of these large-scale features, which partially overlap with each other in projection, suggests that the diffuse molecular component of the Orion A cloud as traced by CO emission has been significantly disrupted by events associated with the energetic star forming activity within its domain.

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