CENTER FOR APPLIED MATHEMATICS AND THEORETICAL PHYSICS
UNIVERZA V MARIBORU $\bullet$ UNIVERSITY OF MARIBOR
KREKOVA 2 $\bullet$ SI-2000 MARIBOR $\bullet$ SLOVENIA
Phone +(386) (2) 2355 350 and 2355 351 $\bullet$ Fax +(386) (2) 2355 360
Robnik@uni-mb.si $\bullet$ www.camtp.uni-mb.si
PROF.DR. MARKO ROBNIK, DIRECTOR

Seminarsko predavanje
Centra za uporabno matematiko in teoretično fiziko

Chaotic and regular motion in a time-dependent barred galaxy model

Dr. Thanos Manos
CAMTP, Univerza v Mariboru

Abstract: I will present a study on the distinction and quantification of chaotic and regular motion in a time-dependent Hamiltonian barred galaxy model. Recently, a strong correlation was found between the strength of the bar and the presence of chaotic motion in this system. Here, I attempt to further explore this connection by studying the interplay between chaotic and regular behavior of star orbits when the parameters of the model evolve in time. This happens for example when one introduces linear time dependence in the mass parameters of the model to mimic the effect of self-consistent interactions of the actual N-body problem. A new way of using the GALI method as a reliable criterion to estimate the relative fraction of chaotic vs. regular orbits in such time-dependent potentials is here applied.

Reference: T. Manos, T. Bountis and Ch. Skokos, to appear in J. Phys. A: Math. Theor. (2012) arXiv: 1208.3551.

Seminarsko predavanje bo v torek 28. maja 2013 ob 15:15 uri v seminarski sobi CAMTP, Krekova 2, pritličje desno. Vljudno vabljeni vsi zainteresirani, tudi študentje.

Prof.Dr. Marko Robnik
-- Direktor CAMTP --