Statistics – Computation
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ap%26ss.159..219w&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 159, no. 2, Sept. 1989, p. 219-238. Research supported by the Japan Societ
Statistics
Computation
Computational Astrophysics, Gravitational Collapse, Star Clusters, Stellar Evolution, Thermal Stability, Astronomical Models, Eigenvalues, Spatial Distribution, Thermodynamic Equilibrium
Scientific paper
The stability and two-component isothermal clusters surrounded by a rigid nonconducting spherical wall is examined by linear normal analyses and nonlinear simulations. The examinations are done for four types of models, classified by the differences concerning gravo-thermal stability and Spitzer's condition. Our results show that perturbations in gravo-thermally stable systems disappears with time and the systems tend to isothermal ones with equipartition, as is expected. On the other hand, in the gravo-thermally unstable systems, the presence of small amount of massive component which has higher central density accelerates the gravo-thermal collapse by heat flowing from the massive component to the less massive component and being transported outward efficiently. This effect of the interaction between two components on gravo-thermal collapse is shown clearly in the forms of the respective eigenfunctions.
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