Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.115...85s&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 115, no. 1, Oct. 1985, p. 85-98.
Astronomy and Astrophysics
Astrophysics
3
Interstellar Gas, Molecular Clouds, Star Formation, Supersonic Flow, Turbulent Flow, Compressed Gas, Fragmentation, Magnetic Effects, Radiant Cooling, Shock Waves, Thermodynamic Equilibrium
Scientific paper
The authors studied fragmentation process of the interstellar molecular cloud with special regard to collisions of turbulent gas elements and formation of a shock-compressed layer by receding shock waves. The propagation of the shock waves and the evolution of the compressed layer are followed until self-gravity becomes significant. It is shown that the efficient cooling by CO molecules and its dependence on gas density make the shock-compressed layer so cold and dense that the layer becomes gravitationally unstable and breaks into fragments. The mass of the fragments is estimated to be about two solar masses or less. The stars formed by collisions of supersonic turbulent gas elements accelerate the surrounding gas in T Tauri stage and replenish the turbulent energy to maintain the mechanical equilibrium of the molecular cloud.
Sabano Yutaka
Tosa Makoto
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