Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...267..163s&link_type=abstract
Astrophysical Journal, Part 1, vol. 267, Apr. 1, 1983, p. 163-173.
Astronomy and Astrophysics
Astrophysics
35
Abundance, Cyanoacetylene, Gas Density, Hydrocyanic Acid, Molecular Clouds, Molecular Spectra, Taurus Constellation, Astronomical Models, Molecular Chains, Spectral Line Width, Stellar Evolution
Scientific paper
The Taurus dark cloud complex is a collection of many individual clouds scattered across approximately 50 pc. Within one of these, Heiles Cloud 2, is the dense condensation TMC 1. TMC 1 is one of the few sources in which some of the long carbon chain molecules are found. The present investigation is concerned with a mapping of the density structure in a narrow ridge of the TMC 1 structure. It is shown that the HC3N emission from the J = 5 to 4, J = 9 to 8, and J = 12 to 11 transitions is well matched by a narrow ridge of material at a single density of 50,000-100,000 per cu cm. There is evidence that the HC3N fractional abundance is variable along the ridge. Evidence is also found for the presence of subcondensations within this ridge from maps at individual velocities.
Schloerb Peter F.
Snell Ronald L.
Young John S.
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