A Note on Gravitational Brownian Motion

Details A Note on Gravitational Brownian Motion A Note on Gravitational Brownian Motion

2004-05-18

arxiv.org/abs/astro-ph/0405351v2

Astrophys.J. 628 (2005) 673-677

Astronomy and Astrophysics

Astrophysics

7 pages, 3 figures

Scientific paper

10.1086/429398

Chandrasekhar's theory of stellar encounters predicts a dependence of the Brownian motion of a massive particle on the velocity distribution of the perturbing stars. One consequence is that the expectation value of the massive object's kinetic energy can be different from that of the perturbers. This effect is shown to be modest however, and substantially smaller than claimed in a recent study based on a more approximate treatment of the encounter equations.

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