The stability and evolution of two-component isothermal clusters
- 26 Downloads
- 2 Citations
Abstract
The stability of two-component isothermal clusters surrounded by a rigid non-conducting 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.
Keywords
Stable System Central Density Massive Component Normal Analysis Unstable SystemPreview
Unable to display preview. Download preview PDF.
References
- Antonov, V. A.: 1962,Vest. Leningr. Gos. Univ. 7, 135.Google Scholar
- Cohn, H.: 1979,Astrophys. J. 234, 1036.Google Scholar
- Hachisu, I. and Sugimoto, D.: 1978,Prog. Theor. Phys. Kyoto 60, 123.Google Scholar
- Inagaki, S. and Wiyanto, P.: 1984,Publ. Astron. Soc. Japan 36, 391.Google Scholar
- Lynden-Bell, D. and Wood, R.: 1968,Monthly Notices Roy. Astron. Soc. 138, 495.Google Scholar
- Saito, M. and Yoshizawa, M.: 1976,Astrophys. Space Sci. 41, 63.Google Scholar
- Spitzer, L.: 1969,Astrophys. J. 158, L139.Google Scholar
- Yoshizawa, M., Inagaki, S., Nishida, M. T., Kato, S., Tanaka, Y., and Watanabe, Y.: 1978,Publ. Astron. Soc. Japan 30, 279.Google Scholar