Formaldehyde observations of OMC-1

Details Formaldehyde observations of OMC-1 Formaldehyde observations of OMC-1

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...146...86b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 146, no. 1, May 1985, p. 86-94.

Astronomy and Astrophysics

Astrophysics

34

Formaldehyde, Hydrogen Clouds, Molecular Clouds, Orion Nebula, Abundance, Astronomical Maps, Brightness Temperature, Carbon Monoxide, Emission Spectra, Radial Velocity, Radio Spectra

Scientific paper

Maps of the emission from the 211 - 212 K-doublet of H212C16O at 2 cm (angular resolution of 60arcsec) and the 312 - 313 line of H212C16O at 1 cm (angular resolution 35arcsec) have been made toward OMC-1. Four clouds are found: two adjacent to the BN/KL region with vLSR = 8 and 10 km s-1, another 90arcsec to the south with 6.5 km s-1 and one ≡80arcsec to the north-east at a radial velocity of 10 km s-1. The authors have also detected emission from the 211 - 212 line of H213CO at 2.2 cm. This result is combined with model calculations to estimate optical depths and H2 densities. The dynamics and stability of the K-doublet emission line region are investigated. Comparisons of the spatial distribution of 211 - 212 H2CO emission with that of O I and CO lines and the far infrared continuum are made.

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