stam.griddata.interpolate_tracks

stam.griddata.interpolate_tracks(tri, color, mag, tracks, param='mass')[source]

Interpolate color-magnitude location over the stellar track grid.

Parameters:

  • tri (Delaunay object) – 2D Delaunay triangulation of the stellar track grid, as retrieved by stam.interp.triangulate_tracks.

  • color (array_like) – Color of the stars (usually Gaia’s Gbp-Grp).

  • mag (array_like) – Absolute magnitude of the stars (usually Gaia’s M_G; same size as color).

  • tracks (Table) – Stellar-track grid, as retrieved by stam.tracks.get_isomasses or stam.tracks.get_combined_isomasses.

  • param (str, optional) – The parameter to evaluate (options: “mass”, “age”, “mh”; default: “mass”).

Returns:

  • x (array_like) – The evaluated parameter.

  • nan_idx (array_like) – NaN-value indices of x.