Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007iaus..240..383c&link_type=abstract
Binary Stars as Critical Tools and Tests in Contemporary Astrophysics, International Astronomical Union. Symposium no. 240, he
Astronomy and Astrophysics
Astrophysics
Scientific paper
Binaries are critical tools that drive stellar systems; which play a major role in galactic dynamics. Internal dynamical evolution of globular clusters (e.g. due to evolution of binaries) can be modulated by external effects (e.g., tidal shocks). This merits a study of the orbital characteristics of binary formation and its applications. We formulate the Hamiltonian treatment of the dynamics of two extended bodies, corresponding to their separation and effective sizes. The internal movement of the constituents of the bodies is taken into account by the hydrodynamic velocities corresponding to their mass distribution and the gravitational potential is considered in the form of a flux. A study of binary motion under spin-orbit synchronization and a condition which favors energy minimization is conducted. Considering binaries to be subsystems in a microcanonical ensemble, we find that for bound binary systems the equipartition distribution of the system parameters favors high eccentricities. Post collapse evolution of globular clusters are driven by energy output of hard binaries. Our model is of such (hard) type and indicates that most of these eccentric binaries will harden by absorbing energy and lower their eccentricities. Numerical simulation indicate that high eccentricities are maintained for a large timescale; circularization takes place in the adiabatic regimen, but in a very large timescale. In three body encounters the binary is hardened and the single star gains velocity. Thus the core of the cluster is gradually heated; which is a major source of energy input, that drives the post collapse evolution. Preliminary results indicate that this model of hard binaries is likely to stabilize post collapse oscillations. The model also throws light on the aspects of dynamical evolution of globular clusters that lead to the correlation between their half-mass density and kinetic temperature.
No associations
LandOfFree
Analytical Binary Modeling and its Role in Dynamics does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Analytical Binary Modeling and its Role in Dynamics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analytical Binary Modeling and its Role in Dynamics will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1811076