Abstract
view Abstract Citations (39) References (39) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Equilibria of Rotating Isothermal Clouds Kiguchi, Masayoshi ; Narita, Shinji ; Miyama, Shoken M. ; Hayashi, Chushiro Abstract The effect of rotation on the equilibrium structure of an axisymmetric isothermal gas cloud embedded in a stationary external medium is investigated by means of numerical simulations. The underlying assumptions, basic equations, input parameters, and numerical approach are explained, and the results are presented in extensive tables and graphs and characterized in detail. The critical central density and rotation energy, beyond which clouds become unstable to global contraction/expansion and ring formation, respectively, are found to be 800 times the boundary-surface density (BSD) and 0.44 times the gravitational energy. Stable rotating clouds are shown to have maximum mass 31 times that of nonrotating clouds, maximum mean rotation velocity 2.7 times the sound speed, and maximum mean density 6 times BSD. An expression for the maximum height of the boundary surface above the equatorial plane is derived. Publication: The Astrophysical Journal Pub Date: June 1987 DOI: 10.1086/165332 Bibcode: 1987ApJ...317..830K Keywords: Interstellar Gas; Isothermal Processes; Molecular Clouds; Nebulae; Rotating Fluids; Angular Momentum; Angular Velocity; Gas Density; Velocity Distribution; Astrophysics; INTERSTELLAR: MOLECULES; NEBULAE: GENERAL; ROTATION full text sources ADS |
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