fastrot-spec

This suite of codes computes the surface parameters -radius, temperature, and effective gravity as a function of the latitude- of rapidly rotating stars with radiative envelopes, and builds their synthetic spectra. The parameterisation of the stellar surface is done using the semianalytical approach of the ESTER model presented by Espinosa-Lara and Rieutord (2011); that approach avoids any discussion about the gravity darkening exponent. The computation of the synthetic spectrum is done using the atlas9 and synthe suite of codes by Kurucz (2014). Three main codes are provided in folder 00_codes/, namely star3d, highrespec3d, and lowrespec3d. star3d computes the parameterization of the stellar surface that will be used by the other two programs to compute the high-resolution (3600-5500 A, R=100,000) and low-resolution (90-1.0e+6 A, variable resolution with wavelength, according to that of the Castelli-Kurucz ODFNEW models). The whole procedure is described in the paper "Surface parameterisation and spectral synthesis of rapidly rotating stars. Vega as a test bed" (Montesinos, B., 2024, Astronomy and Astrophysics, 688, A97).