Astronomisches Rechen-Institut Heidelberg

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ARI-Heidelberg Mitteilungen Serie A, No. 190

Author(s): Fuchs, B., Wielen, R.
Title: Dynamical Evolution of the Galactic Disk
Source: In: The Galaxy. Proc. NATO Advanced Study Institute, Cambridge, UK, 4-15 August 1986; G. Gilmore, B. Carswell (eds.), NATO ASI Ser., Ser. C: Math. Phys. Sci. 207, Reidel, Dordrecht, p. 375-398
Year: 1987
Abstract: After some introductory remarks on the dynamical evolution of the Galactic disk, we review mechanisms which may affect the velocities of disk stars: stochastic heating, adiabatic heating or cooling, and deflections. We present in some detail a dynamical interpretation of the observed velocity distribution of nearby stars by the diffusion of stellar orbits in velocity space. Finally we comment on the stability of the Galactic disk and discuss the consequences of the diffusion process for the orbit of the Sun.
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