interpolate_sersic_profile_VC

deprojected_sersic_models.interpolate_sersic_profile_VC(R=None, total_mass=None, Reff=None, n=1.0, invq=5.0, path=None, filename_base='deproj_sersic_model', filename=None, table=None, interp_type='cubic')[source]

Interpolate vcirc(R) at arbitrary radii R, for arbitrary Mtot and Reff.

Uses the saved table of vcirc(R) values for a given Sersic index n and invq, and performs scaling and interpolation to map the profile onto the new Mtot and Reff. (by mapping the radius using R’ = (R/Reff * table_Reff), and scaling for the difference between Mtot and table_Mtot)

Parameters:

  • R (float or array_like) – Radius at which to interpolate profile [kpc]

  • total_mass (float) – Total mass of the component [Msun]

  • Reff (float) – Effective radius of Sersic profile [kpc]

  • n (float) – Sersic index

  • invq (float) – Inverse of the intrinsic axis ratio of Sersic profile, invq = 1/q

  • path (str, optional) – Path to directory containing the saved Sersic profile tables. If not set, system variable DEPROJECTED_SERSIC_MODELS_DATADIR must be set. Default: system variable DEPROJECTED_SERSIC_MODELS_DATADIR, if specified.

  • filename_base (str, optional) – Base filename to use, when combined with default naming convention: <path>/<filename_base>_nX.X_invqX.XX.fits Default: deproj_sersic_model

  • filename (str, optional) – Option to override the default filename convention and instead directly specify the file location.

  • interp_type (str, optional) – Default profile interpolation within the table Rarr region. (Extrapolation is always linear). Default: cubic

  • table (dict, optional) – Option to pass the Sersic profile table, if already loaded.

Returns:

vcirc_interp

Return type:

float or array_like