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Dynamics Of An Interacting Luminous Disc, Dark Halo And Satellite Companion, Md Weinberg
Dynamics Of An Interacting Luminous Disc, Dark Halo And Satellite Companion, Md Weinberg
Astronomy Department Faculty Publication Series
This paper describes a method, based on linear perturbation theory, to determine the dynamical interaction between extended halo and spheroid components and an environmental disturbance. One finds that resonant interaction between a galaxy and passing interlopers or satellite companions can carry the disturbance inward, deep inside the halo, where it can perturb the disc. Applied to the Milky Way for example, the LMC and SMC appear to be sufficient to cause the observed Galactic warp and possibly seed other asymmetries. This is a multi-scale interaction in which the halo wake has a feature at roughly half the satellite orbital radius …