Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...282l..77o&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 282, July 15, 1984, p. L77-L79.
Astronomy and Astrophysics
Astrophysics
17
Carbon Disulfide, Interstellar Matter, Molecular Clouds, Orion Nebula, Astronomical Maps, H Alpha Line, H Ii Regions, High Resolution, Ionization
Scientific paper
High-resolution strip maps of CS (J = 1-0) and H51-alpha line emission across the Orion bright bar are presented. The intensity of CS emission is weaker in the H II region with a rapid increase at the optical bar, while the H51-alpha line was detected only on the side of the H II region. The variation of the CS intensity can be reproduced by a beam-convolved step function with the position of the step coincident with the ionization front. The molecular cloud associated with the bright bar is redshifted relative to the ambient molecular cloud by about 2 km/s. This may suggest the dynamical interactions between the molecular cloud and the H II region excited by the Trapezium stars.
Hasegawa Takuya
Hayashi Masahito
Omodaka Toshihiro
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