The physical structure of Orion-KL on 2500 AU scales using the K-doublet transitions of formaldehyde

Details The physical structure of Orion-KL on 2500 AU scales using the K-doublet transitions of formaldehyde The physical structure of Orion-KL on 2500 AU scales using the K-doublet transitions of formaldehyde

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...409..282m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 409, no. 1, p. 282-298.

Astronomy and Astrophysics

Astrophysics

22

Electron Transitions, Formaldehyde, Interstellar Matter, Molecular Clouds, Orion Nebula, Physical Properties, Interferometry, Star Formation, Stellar Mass

Scientific paper

Synthesized beamwidths of 5.1 arcsec for 2400 AU and 7.6 arcsec for 3500 AU are used, in the present study of interferometric observations of the 110 to 111 and 514 to 515 transitions of H2CO toward the molecular cloud Orion-KL, to identify emission from the hot core, compact ridge, and northern cloud regions. A discussion of H2CO as a spatial density probe indicates that the K-doublet transitions are ideal for this role, since they achieve appreciable optical depths only at the highest column densities.

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