# Triaxial power-law-density potential¶

class galpy.potential.PowerTriaxialPotential(amp=1.0, alpha=1.0, r1=1.0, b=1.0, c=1.0, zvec=None, pa=None, glorder=50, normalize=False, ro=None, vo=None)[source]

Class that implements triaxial potentials that are derived from power-law density models (including an elliptical power law)

$\rho(r) = \frac{\mathrm{amp}}{r_1^3}\,\left(\frac{r_1}{m}\right)^{\alpha}$

where $$m^2 = x^2+y^2/b^2+z^2/c^2$$.

__init__(amp=1.0, alpha=1.0, r1=1.0, b=1.0, c=1.0, zvec=None, pa=None, glorder=50, normalize=False, ro=None, vo=None)[source]

NAME:

__init__

PURPOSE:

initialize a triaxial power-law potential

INPUT:

amp - amplitude to be applied to the potential (default: 1); can be a Quantity with units of mass or Gxmass

alpha - power-law exponent

r1= (1.) reference radius for amplitude (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:

2021-05-07 - Started - Bovy (UofT)