Lopsided disk potential

Like in Kuijken & Tremaine, but for m=1

class galpy.potential.LopsidedDiskPotential(amp=1.0, phib=0.4363323129985824, p=1.0, phio=0.01, tform=None, tsteady=None, cp=None, sp=None)

Class that implements the disk potential

\[\Phi(R,\phi) = \phi_0\,R^p\,\cos\left(\phi-\phi_b\right)\]

See documentation for CosmphiDiskPotential