Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...283..129s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 283, Aug. 1, 1984, p. 129-139.
Astronomy and Astrophysics
Astronomy
50
Molecular Clouds, Radio Sources (Astronomy), Rotating Matter, Stellar Evolution, Astronomical Maps, Carbon Monoxide, Gravitational Collapse, Nebulae, Ring Structures, Toroidal Plasmas
Scientific paper
The J = 1 - 0 transition of (C-13)O over a 3 sq deg region in Heiles Cloud 2 has been mapped using the Five College Radio Astronomy Observatory 14 m telescope. The complete map contains 3600 individual spectra of which 2400 were sampled with 1 arcmin spacing. The map suggests that the structure of Heiles Cloud 2 is dominated by a quasi-equilibrium rotating ring similar to those found in numerical calculations of the gravitational collapse of a rotating cloud. Within this ring, several dense condensations have been identified and partially mapped in C(O-18). These subcondensations, among which is the dense filament TMC-1, probably result from the instability of the ring to fragmentation and have masses on the order of the jeans mass. Thus, they are marginally unstable to further collapse and may be the precursors of fragments that will eventually form stars.
Schloerb Peter F.
Snell Ronald L.
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