Speaker
Dr
Aaron Sigut
(The University of Western Ontario)
Description
I will describe the operation and atomic data requirements of the Bedisk and Beray codes which can be used to compute synthetic spectra and images for a star surrounded by a circumstellar disk. The Bedisk code computes the thermal structure of the disk based on the central star's photoionizing radiation field by enforcing radiative equilibrium in a gas of a user-specified chemical composition. The code has a large atomic data requirement, including transition probabilities, photoionization cross sections, and effective collision strengths for all atoms and ions included. Detailed line spectra, spectral energy distributions, and synthetic images are computed by the Beray code for comparison to observations. I will also discuss several applications of these codes, including to the classical Be stars, to the pre-main sequence Herbig Be stars, and to the post-main sequence sgB[e] stars.
Primary author
Dr
Aaron Sigut
(The University of Western Ontario)
