NAME:
LinShuReductionFactor
PURPOSE:
Calculate the Lin & Shu (1966) reduction factor: the reduced linear response of a kinematically-warm stellar disk to a perturbation
INPUT:
axiPot - The background, axisymmetric potential
R - Cylindrical radius
sigmar - radial velocity dispersion of the population
Then either provide:
m= m in the perturbation’s m x phi (number of arms for a spiral)
k= wavenumber (see Binney & Tremaine 2008)
OmegaP= pattern speed
nonaxiPot= a non-axisymmetric Potential instance (such as SteadyLogSpiralPotential) that has functions that return OmegaP, m, and wavenumber
OUTPUT:
reduction factor
HISTORY:
2014-08-23 - Written - Bovy (IAS)