# Evolutionary Models¶

Evolutionary models are read from a file created by a separate stellar evolution code. The format of this file is specified by the file_format parameter of the &model namelist group (see the Stellar Model Parameters section). Possible choices are:

AMDL
Binary file describing an evolutionary model in ASTEC format (as reverse engineered from the ADIPLS stellar oscillation code; see Christensen-Dalsgaard, 2008).
FAMDL
Text file describing an evolutionary model in FAMDL format (as specified in the CoRoT/ESTA File Formats document).
FGONG
Text file describing an evolutionary model in FGONG format (as specified in the updated FGONG Format document).
GSM
HDF5 file describing an evolutionary model in GYRE Stellar Model (GSM) format (as specified in the GSM File Format section).
MESA
Text file describing an evolutionary model in MESA format (as specified in the MESA File Format section).
B3
HDF5 file describing an evolutionary model in B3 format. This format is for testing purposes only, and will eventually be superseded and/or removed.
LOSC
Text file describing an evolutionary model in the revised LOSC format.
OSC
Text file describing an evolutionary model in OSC format (as specified in the CoRoT/ESTA File Formats document).
WDEC
Text file describing an evolutionary model in WDEC format (see Bischoff-Kim & Montgomery, 2018)

For all of these model formats, cubic spline interpolation is used to evaluate data between model grid points. The deriv_type parameter in the &model namelist group controls how the spline derivatives are set up.