Grids of models

BASTA uses grids of stellar tracks or isochrones stored in hierarchical data format hdf5. The list of parameters included in our grids can be seen in the parameter list, but one should keep in mind that not all parameters are included in all grids. As an example, isochrones do not contain individual frequencies of oscillations while stellar tracks do, and fits to e.g., frequency ratios can only be performed with grids of stellar tracks. If in doubt about a particular entry in the parameter list you are encouraged to contact one of the core developers of BASTA.

A small grid is downloaded automatically with the installation of BASTA and is stored in BASTA/grids/Garstec_16CygA.hdf5. As the name suggest, this grid is built with the GARching STellar Evolution Code around the observed parameters of the Kepler target 16 Cyg A. Many of the Examples of fits are built using this grid, while others are constructed from larger grids that can be downloaded.

For this purpose, BASTA includes a grid download tool that can be easily accessed from the command line. After installing the code, go to the BASTA folder and run the following:

BASTAdownload -h

and follow the instructions to download the grids. Currently the following grids are available for download:

Additional grids can be built by the BASTA core development team upon reasonable request. Currently we are working on the following additions to the list of grids:

Stay tuned to the repository updates if you are interested in these grids.