fit_isochrone¶
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gala.dynamics.
fit_isochrone
(orbit, m0=200000000000.0, b0=1.0)[source]¶ Fit the toy Isochrone potential to the sum of the energy residuals relative to the mean energy by minimizing the function
\[\begin{split}f(m,b) = \sum_i (\frac{1}{2}v_i^2 + \Phi_{\rm iso}(x_i\,|\,m,b) - <E>)^2\end{split}\]Parameters: orbit :
CartesianOrbit
m0 : numeric (optional)
Initial mass guess.
b0 : numeric (optional)
Initial b guess.
Returns: m : float
Best-fit scale mass for the Isochrone potential.
b : float
Best-fit core radius for the Isochrone potential.