A Note on Gravitational Brownian Motion | Zendy

David Merritt | Zendy

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A Note on Gravitational Brownian Motion

Author(s) -

David Merritt

Publication year - 2005

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/429398

Subject(s) - chandrasekhar limit , brownian motion , physics , classical mechanics , kinetic energy , massive particle , motion (physics) , kinetic theory , geometric brownian motion , gravitation , stars , object (grammar) , astrophysics , theoretical physics , diffusion process , white dwarf , dark matter , quantum mechanics , economics , linguistics , philosophy , economy , service (business)

Chandrasekhar's theory of stellar encounters predicts a dependence of theBrownian motion of a massive particle on the velocity distribution of theperturbing stars. One consequence is that the expectation value of the massiveobject's kinetic energy can be different from that of the perturbers. Thiseffect is shown to be modest however, and substantially smaller than claimed ina recent study based on a more approximate treatment of the encounterequations.Comment: 7 pages, 3 figure

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