Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...113l..18o&link_type=abstract
Astronomy and Astrophysics, vol. 113, no. 2, Sept. 1982, p. L18-L21. Research supported by the Styrelsen for Teknisk Utveckling
Astronomy and Astrophysics
Astrophysics
39
Astronomical Maps, Emission Spectra, Molecular Clouds, Molecular Flow, Orion Nebula, Anisotropy, Flow Velocity, H Lines, Infrared Spectra, Shock Heating
Scientific paper
A mapping of the CO and HCO(+) J=1-0 emissions towards Orion-KL shows that sources with velocities higher than 100 km/sec are both smaller than 30 arcsec, and located north of the KL-nebula. Spatial anisotropy is suggested by the fact that, for both molecular species, the redshifted high velocity emission dominates east of KL, while blueshift predominates to the north. An outflow of polar type is suggested by the falling of the red and blue brightness maxima along a line connecting the two intense 2-micron H2 emission peaks. An HCO(+) emission component of about 40 km/sec extends almost 2 arcmin northwards, in the form of a spatially narrow ridge which roughly coincides with the 2-micron H2 emission. The HCO(+) emission component, which appears to be enhanced relative to CO and HCN by a factor of more than 15, is assigned to the shocked gas responsible for the intense H2 IR emission.
Ellder Joel
Hjalmarson Å..
Olofsson Hans
Rydbeck Gustaf
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