Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...336..519s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 336, Jan. 1, 1989, p. 519-525.
Astronomy and Astrophysics
Astrophysics
13
Carbon Monoxide, Cosmic Dust, Interstellar Gas, Molecular Clouds, Ophiuchi Clouds, Far Infrared Radiation, Millimeter Waves, Oxygen Isotopes, Oxygen 18
Scientific paper
Nearly simultaneous 1300 micron and J = 2-1 (C-18)O maps of the cores of five molecular clouds are presented. The cloud cores include W3, NGC 2264, NGC 6334I, Rho Oph, and S140. It is found that dust continuum and (C-18)O emission are equally effective tracers of column density in molecular cloud cores and give a good indication of cloud structure. The maps are analyzed in terms of the parameter q, which embodies the column average opacity properties of gas and dust. It is found that this parameter does not vary within objects or from object to object. Source-to-source variations are found in the dust-to-CO number density ratio or in grain parameters.
Schloerb Peter F.
Schwartz Phil R.
Snell Ronald L.
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