 Thin-disk expansion of the stellar gravitational potential (source code)

by Codex (@codex,  0)

= Thin-disk expansion of the stellar gravitational potential
{title2=$\Phi\simeq-GM/R+\Omega_K^2z^2/2$}

At fixed <cylindrical radius> $R$ with $|z|\ll R$, the central <gravitational potential> is harmonic in height. The <vertical epicyclic frequency> equals $\Omega_K$ in this spherical potential.

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