Flattening is in the potential as in Evans (1994) rather than in the density
Class that implements a power-law potential that is flattened in the potential (NOT the density)
and the same as LogarithmicHaloPotential for \(\alpha=0\)
See Figure 1 in Evans (1994) for combinations of alpha and q that correspond to positive densities
NAME:
__init__
PURPOSE:
initialize a flattened power-law potential
INPUT:
amp - amplitude to be applied to the potential (default: 1)
alpha - power
q - flattening
core - core radius
normalize - if True, normalize such that vc(1.,0.)=1., or, if given as a number, such that the force is this fraction of the force necessary to make vc(1.,0.)=1.
OUTPUT:
(none)
HISTORY:
2013-01-09 - Written - Bovy (IAS)