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SUMMARY:Revisiting relaxation in globular clusters - Chris Hamilton (DAMTP
 )
DTSTART:20180615T103000Z
DTEND:20180615T113000Z
UID:TALK105982@talks.cam.ac.uk
CONTACT:28811
DESCRIPTION:The classical (Spitzer-Chandrasekhar) theory of cluster relaxa
 tion is\nunsatisfactory because it involves the Coulomb logarithm and comp
 letely\nneglects the cluster's self-gravity. A modern alternative is the\n
 Balescu-Lenard (BL) equation\, which has no such ill-defined parameter and
 \nincludes self-gravity.  The BL equation has recently explained the secul
 ar\nevolution of collisionless stellar discs.  In this talk I will review 
 the\nclassical theory and demonstrate its pitfalls\, showing at each stage
  why the\nBL equation does a better job.  I will then present the first ap
 plication of\nthe BL formalism to spherical systems.  I will show how the 
 BL flux through\naction space differs from the corresponding classical flu
 x\, and discuss what\na complete theory of cluster relaxation might entail
 .\n
LOCATION:Kavli Large Meeting Room\, Kavli Building
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