Statistics – Computation
Scientific paper
Jan 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...142..157f&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 142, no. 1, Jan. 1985, p. 157-170.
Statistics
Computation
78
Astronomical Models, Computational Astrophysics, Cosmic Dust, Hydrostatics, Interstellar Matter, Molecular Clouds, Density Distribution, Equations Of State, Kinematics, Radiative Heat Transfer, Stellar Evolution, Ultraviolet Radiation
Scientific paper
The equations of state and density structure of thermally supported self-gravitating condensations of interstellar gas mixed with dust are calculated. The method used to solve the coupled equations of hydrostatic equilibrium and equation of state is described, and the cooling and heating mechanisms which enter the computation are reviewed. It is shown that self-gravitating condensations which are thermally supported present a clear core-envelope structure as soon as the central density is larger than 10,000/cu cm. The isothermal cores are necessarily surrounded by an envelope because their boundary pressure is orders of magnitude larger than that of the diffuse interstellar medium. The core-envelope boundary occurs everywhere at the same density, about the same radius (0.09 pc), with a core mass of about two solar masses and at UV opacity larger than three.
Falgarone Edith
Puget Jean-Loop
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