TITLE: Shellspec - a tool to study spectra, light curves, and images of
interacting binaries and exoplanets

AUTHOR: Jan Budaj, AI SAS

ABSTRACT:
Program SHELLSPEC is designed to calculate light curves, spectra and
images of interacting binaries and extra-solar planets immersed in a
moving gaseous or dusty circumstellar matter (CM). It solves simple
radiative transfer along the line of sight in 3D moving media.
The Roche model and synthetic spectra from the stellar atmosphere models
such as TLUSTY from Ivan Hubeny can be used as a boundary condition for
the radiative transfer.  The scattered light from the two stars can be
taken into account assuming that CM is optically thin.
The assumptions include LTE and optional known state quantities and
velocity fields in 3D. These can be taken from the 3D hydrodynamic
simulations.
Alternatively,  optional  (non)transparent  objects  such  as:  a  central
 star,  companion  star, envelope,  spot,  stream,  ring,  disc,  nebula, 
flow,  jet,  ufo,  or  a  shell  may  be  defined  in  3D
and their composite synthetic spectrum calculated.  The stars may have
either the Roche or spherical geometry, optional velocity or rotation, and
may have spots.  They are subject to the gravity darkening, limb
darkening, and irradiation effect including the heating, reflection, and
day-night heat redistribution.
Synthetic light curves or trailing spectrograms can be produced by
changing your view points on the 3D object.
A  few  examples  with  applications  to  spectroscopy,  Doppler 
tomography,  photometry,  and interferometry of binary stars and
transiting exoplanets will be presented.