Preliminaries

BRUCE / KYLIE

BRUCE / KYLIE are a pair of open-source Fortran 77 codes for synthesizing spectra of pulsating stars. BRUCE constructs a point-sampled model for the surface of a rotating, gravity-darkened star, and then subjects this model to perturbations arising from one or more non-radial pulsation modes. Departures from adiabaticity can be taken into account, as can the Coriolis force through adoption of the traditional approximation of rotation.

BRUCE writes out a time-series of perturbed surface models. This series is read in by KYLIE, which synthesizes disk-integrated spectra for the models by co-adding the specific intensity emitted by each visible surface point. The specific intensities are evaluated via interpolation in a pre-calculated grid. More-detailed descriptions of both BRUCE and KYLIE are provided in Townsend (1997a) and Townsend (1997b).

PyKYLIE

Historically, it was not possible to distribute a specific intensity grid with BRUCE/KYLIE. However, this situation changed with the development of Multidimensional Specgral Grids (MSG), an open-source package for synthesizing stellar spectra and photometric colors via interpolation in pre-calculated grids. PyKYLIE is a Python re-implementation of the original KYLIE code, built on top of MSG.

Obtaining PyKYLIE

The source code for PyKYLIE is hosted in the https://github.com/rhdtownsend/pykylie git repository on GitHub. Instructions for installing the software can be found in the Installation chapter.

Development Team

PyKYLIE remains under active development by the following team:

Rich Townsend (University of Wisconsin-Madison); project leader

If you are interested in contributing toward further development of PyKYLIE, please see the Contributing chapter.

Acknowledgments

MSG has been developed with financial support from the following grants:

NASA award 80NSSC20K0515.