From iau174 Sat Aug 12 21:20:56 1995 Received: by chianti.c.u-tokyo.ac.jp (4.1/2.7W-utc1.9) id AA03126; Sat, 12 Aug 95 21:20:56 JST Date: Sat, 12 Aug 95 21:20:56 JST From: iau174 Message-Id: <9508121220.AA03126@chianti.c.u-tokyo.ac.jp> To: makino Subject: [IAU 174 abstract 18 ] Status: R >From ro@ast.cam.ac.uk Sat Aug 12 21:20:40 1995 Received: from kyohou.c.u-tokyo.ac.jp by chianti.c.u-tokyo.ac.jp (4.1/2.7W-utc1.9) id AA03106; Sat, 12 Aug 95 21:20:40 JST Received: from cass41.ast.cam.ac.uk by kyohou.c.u-tokyo.ac.jp (5.64/2.7W-utc1.9) id AA08287; Sat, 12 Aug 95 21:12:26 +0900 Return-Path: Received: from cass21.ast.cam.ac.uk by cass41 with smtp (Smail3.1.29.1 #9) id m0shFSF-000CLzC; Sat, 12 Aug 95 13:14 BST Received: by cass21.ast.cam.ac.uk (Smail3.1.29.1 #9) id m0shFSC-0002DoC; Sat, 12 Aug 95 13:14 BST Message-Id: Date: Sat, 12 Aug 95 13:14 BST From: ro@ast.cam.ac.uk (Rosemary Mardling) To: iau174_abstract@chianti.c.u-tokyo.ac.jp Subject: abstract Content-Length: 1162 Chaos and the Dynamical Evolution of Tidal Capture Binaries in Clusters Rosemary A. Mardling Department of Mathematics, Monash University, Melbourne, Australia Before the discovery of primordial binaries in globular clusters, tidal capture binaries were thought to be the main source of fuel for core support and reexpansion, and also be responsible for the excess of low-mass X-ray binaries in globular cluster cores. Various models of the evolution of tidal capture binaries then suggested that they would not survive the circularization process. We present a model for the long-term dynamical evolution of tidal capture binaries which shows that following capture, a binary goes through a short violent phase during which the orbit is chaotic and the tides are extremely energetic. This is followed by a long quiescent circularization phase during which the tides are small. Depending on how the tidal energy is dissipated and on what timescale(s) circularization takes place, tidal capture binaries may yet play some role in the dynamical evolution of globular clusters, with some evolving to become low-mass X-ray binaries and millisecond pulsars.