Perfect Ellipsoid potential¶
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class
galpy.potential.
PerfectEllipsoidPotential
(amp=1.0, a=5.0, b=1.0, c=1.0, zvec=None, pa=None, glorder=50, normalize=False, ro=None, vo=None)¶ Potential of the perfect ellipsoid (de Zeeuw 1985):
\[\rho(x,y,z) = \frac{\mathrm{amp\,a}}{\pi^2\,bc}\,\frac{1}{(m^2+a^2)^2}\]where \(\mathrm{amp} = GM\) is the total mass and \(m^2 = x^2+y^2/b^2+z^2/c^2\).
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__init__
(amp=1.0, a=5.0, b=1.0, c=1.0, zvec=None, pa=None, glorder=50, normalize=False, ro=None, vo=None)¶ NAME:
__init__PURPOSE:
initialize a perfect ellipsoid potentialINPUT:
amp - amplitude to be applied to the potential (default: 1); can be a Quantity with units that depend on the specific spheroidal potential
a - scale radius (can be Quantity)
b - y-to-x axis ratio of the density
c - z-to-x axis ratio of the density
zvec= (None) If set, a unit vector that corresponds to the z axis
pa= (None) If set, the position angle of the x axis (rad or Quantity)
glorder= (50) if set, compute the relevant force and potential integrals with Gaussian quadrature of this order
ro=, vo= distance and velocity scales for translation into internal units (default from configuration file)
OUTPUT:
(none)HISTORY:
2018-08-06 - Started - Bovy (UofT)
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