Certain families of razor-thin disk surface densities based on beta distributions and relatives produce gravitational potentials equivalent to linear mass distributions, often via single quadratures or closed forms.
Theγ= 1 2 case (Σ∝R −1), for which 32 c =GM(R)/R=GM 0/R0 =3 2 0 and1=3 2 0/z, is the scale- free Mestel disk (see Sect
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Potentials of axisymmetric razor-thin disks
Certain families of razor-thin disk surface densities based on beta distributions and relatives produce gravitational potentials equivalent to linear mass distributions, often via single quadratures or closed forms.