Potentials for the central parts of a barred galaxy

Details Potentials for the central parts of a barred galaxy Potentials for the central parts of a barred galaxy

Apr 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...332...88c&link_type=abstract

Astronomy and Astrophysics, v.332, p.88-92 (1998)

Astronomy and Astrophysics

Astrophysics

9

Methods: Analytical, Galaxy: Kinematics And Dynamics

Scientific paper

On the grounds of the figure-eight orbits found by Miller and Smith (1979) we obtain a general potential to model the central parts of a barred galaxy. The orbits are given in parametric form x=3Dx(lambda ,b), y=3Dy(lambda ,b) and the potential is obtained as a power series in the small parameter b. It is found that the resulting potential depends on an arbitrary function V_o(lambda ) and its first derivative. As a typical example we present a potential V(x,y) which is a perturbed harmonic oscillator, symmetric to both axes x and y with terms up to the fourth degree in the variables x,y.

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