SCYON Abstract

Received on February 22 2003

Parameters of Core-Collapse

AuthorsHolger Baumgardt(1), Douglas C. Heggie(2), Piet Hut(3), Jun Makino(1)
Affiliation(1) University of Tokyo,
(2) University of Edinburgh
(3) IAS, Princeton
Accepted byMonthly Notices of the Royal Astronomical Society


This paper considers the phenomenon of deep core collapse in collisional stellar systems, with stars of equal mass. The collapse takes place on some multiple, xi-1, of the central relaxation time, and produces a density profile in which rho ~ r-alpha, where alpha is a constant. The parameters alpha and xi have usually been determined from simplified models, such as gas and Fokker-Planck models, often with the simplification of isotropy. Here we determine the parameters directly from N-body simulations carried out using the newly completed GRAPE-6.