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Astron. Astrophys. 342, 34-40 (1999)

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5. Conclusion

In this paper we calculated the distribution function and the first moment of [FORMULA] for an inhomogeneous system. We obtained an expression relating [FORMULA] to the degree of inhomogeneity in a gravitational system. In the last part of the paper we showed the implications of this result on the dynamical friction in a inhomogeneous system and in particular how inhomogeneity acts as an amplifier of the asimmetry effect giving rise to dynamical friction. Here we want to stress that the distribution function that we have obtained is valid for every inhomogeneous system and consequently it is more general than the distribution function obtained by CN43, that is reobtained when we assume [FORMULA] in our model. Moreover Kandrup's (1980a) theory of the stationary distribution [FORMULA] for inhomogeneous systems is reobtained in the limit [FORMULA].

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© European Southern Observatory (ESO) 1999

Online publication: December 22, 1998