Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...236..192v&link_type=abstract
Astrophysical Journal, Part 1, vol. 236, Feb. 15, 1980, p. 192-200.
Astronomy and Astrophysics
Astronomy
30
Gravitational Collapse, Interstellar Gas, Nebulae, Stellar Evolution, Astronomical Models, Gas Density, Hydrogen, Infrared Astronomy, Magnetohydrodynamics
Scientific paper
The dynamic collapse of rotating gas clouds is calculated for a wide range of initial conditions. Properties of cloud models are compared with observed radio and optical properties of Bok globules, to test the hypothesis that globules undergo collapse and to determine parameters which are not easily observed. Five of the six globules studied are consistent with collapse models. It is inferred that these objects have masses of about 100 solar masses and ages smaller than their free-fall times. Inferred initial densities are much larger than minimum densities for gravitational collapse, suggesting that collapse is initiated by strong external compression or that globules are fragments of larger condensed clouds. Values inferred for the (C-13)O/H2 ratio are smaller than previous estimates and depend strongly on cloud density.
Black David C.
Villere Karen R.
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