Dehnen DF

class galpy.df.dehnendf(surfaceSigma=<class 'galpy.df.surfaceSigmaProfile.expSurfaceSigmaProfile'>, profileParams=(0.3333333333333333, 1.0, 0.2), correct=False, beta=0.0, **kwargs)

Dehnen’s ‘new’ df

__init__(surfaceSigma=<class 'galpy.df.surfaceSigmaProfile.expSurfaceSigmaProfile'>, profileParams=(0.3333333333333333, 1.0, 0.2), correct=False, beta=0.0, **kwargs)

Initialize a Dehnen ‘new’ DF.

Parameters:

• surfaceSigma (instance or class name of the target surface density and sigma_R profile, optional) – Default: both exponential.

• profileParams (tuple, optional) –

  Parameters of the surface and sigma_R profile: (xD,xS,Sro) where:

  • xD - disk surface mass scalelength (can be Quantity)

  • xS - disk velocity dispersion scalelength (can be Quantity)

  • Sro - disk velocity dispersion at Ro (can be Quantity)

  Directly given to the ‘surfaceSigmaProfile class, so could be anything that class takes.

• beta (float, optional) – Power-law index of the rotation curve.

• correct (bool, optional) – If True, correct the DF.

• ro (float or Quantity, optional) – Distance scale for translation into internal units (default from configuration file).

• vo (float or Quantity, optional) – Velocity scale for translation into internal units (default from configuration file).

• **kwargs (dict, optional) – DFcorrection kwargs (except for those already specified).

Notes

• 2010-03-10 - Written - Bovy (NYU)