Gravitational loss of momentum and energy by bodies moving through surrounding matter
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For the resistance of relative motion between solids, see Dynamic friction.
In astrophysics, dynamical friction or Chandrasekhar friction, sometimes called gravitational drag, is loss of momentum and kinetic energy of moving bodies through gravitational interactions with surrounding matter in space. It was first discussed in detail by Subrahmanyan Chandrasekhar in 1943.[1][2][3]
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^Chandrasekhar, S. (1943), "Dynamical Friction. I. General Considerations: the Coefficient of Dynamical Friction" (PDF), Astrophysical Journal, 97: 255–262, Bibcode:1943ApJ....97..255C, doi:10.1086/144517
^Chandrasekhar, S. (1943), "Dynamical Friction. II. The Rate of Escape of Stars from Clusters and the Evidence for the Operation of Dynamical Friction", Astrophysical Journal, 97: 263–273, Bibcode:1943ApJ....97..263C, doi:10.1086/144518
^Chandrasekhar, S. (1943), "Dynamical Friction. III. a More Exact Theory of the Rate of Escape of Stars from Clusters" (PDF), Astrophysical Journal, 98: 54–60, Bibcode:1943ApJ....98...54C, doi:10.1086/144544
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