Talk:Dynamical friction
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(William M. Connolley 10:03, 11 Jul 2004 (UTC)) No obvious evidence for the use of this term found via google. OTOH the everyday meaning of friction is found.
(William M. Connolley 12:35, 11 Jul 2004 (UTC)) Hmm, perhaps I'm wrong: http://citebase.eprints.org/cgi-bin/citations?id=oai:arXiv.org:astro-ph/0305052
- I tried Google out of curiosity (since your claim seemed unbelivable) and got 13,400 links to articles mentioning dynamical friction (are you sure your spelling was right?). Here is a link to the first of them: http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1976ApJ...203...72T&db_key=AST
- Jim 19:45, 11 Dec 2004 (UTC)
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- (William M. Connolley 19:57, 11 Dec 2004 (UTC)) I can't account for my first comment, which is clearly wrong. I think my second was intended to correct it.
Dynamical friction per se is fine with me. But I'm under the impression, that it can only effect "slowly" moving things and that the effect should be zero for something traveling at the speed of light. The increased gravity formed by masses being attracted to the moving mass-energy, has no chance to influence the mass-energy speeding away with c. --Pjacobi 10:46, September 4, 2005 (UTC)
- The last part of the article as it was written was crackpot cosmology. I've removed it and clarified why it's unphysical. --TMB 14:11, 8 Dec 2005 (AEDT)
Is anyone going to be brave enough to put a derivation down for the full dynamical friction formula?
![\textbf{F}_{dyn}=M\frac{d\textbf{v}_M}{dt}=-\frac{4\pi ln\Lambda G^2 \rho M^2}{\nu_M^3}\left[erf(\nu/(\sqrt{2}\sigma)-\frac{\sqrt{2}\nu}{\sigma\sqrt{\pi}}e^{-\nu^2/2\sigma^2}\right]\textbf{v}_M](../../../math/b/9/b/b9b643403d243d5cacd77ad1843f32ec.png)
I would if I could understand it.
