Symmetries and Bifurcations in the Sitnikov Problem

Astronomy and Astrophysics – Astronomy

Scientific paper

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Sitnikov Problem, Symmetry, Periodic Orbit, Bifurcations, Sitnikov Problem, Symmetry, Periodic Orbit, Bifurcations

Scientific paper

We present some qualitative and numerical results of the Sitnikov problem, a special case of the three-body problem, which offers a great variety of motions as the non-integrable systems typically do. We study the symmetries of the problem and we use them as well as the stroboscopic Poincarée map (at the pericenter of the primaries) to calculate the symmetry lines and their dynamics when the parameter changes, obtaining information about the families of periodic orbits and their bifurcations in four revolutions of the primaries. We introduce the semimap to obtain the fundamental lines l 1. The origin produces new families of periodic orbits, and we show the bifurcation diagrams in a wide interval of the eccentricity (0 ≤ ɛ ≤ 0.97). A pattern of bifurcations was found.

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