GSM File Format

Files in GSM (GYRE Stellar Model) format store HDF5 data describing a stellar model. This format is intended as a portable, storage-efficient alternative to the MESA File Format. To create one of these files in MESA (from revision 21.12.1 onward), set the pulse_data_format option of the &controls namelist group to the value 'GSM'.

The GSM format adheres to the following conventions:

• All data objects are attached to the root HDF5 group (/)

• Real values are written with type H5T_IEEE_F64LE

• Integer values are written with type H5T_STD_I32LE

There are a number of versions of the GSM format, distinguished by the version attribute in the root group:

• Version 0.00
• Version 1.00
• Version 1.10
• Version 1.20