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.