Light Curves, Radial-velocity Curves And Doppler Tomographic Maps Generated From Computationally Modeled, Close Binary Stars

Details Light Curves, Radial-velocity Curves And Doppler Tomographic Maps Generated From Computationally Modeled, Close Binary Stars Light Curves, Radial-velocity Curves And Doppler Tomographic Maps Generated From Computationally Modeled, Close Binary Stars

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...208.7703p&link_type=abstract

American Astronomical Society, AAS Meeting #208, #77.03

Statistics

Computation

Scientific paper

We have developed a computational technique that generates a synthetic light-curve, radial-velocity curve and Doppler tomographic map from three-dimensional models of tidally distorted and mass-transferring close binary stars. Until now one of the most heavily used techniques for generating light curves of close binary stars has been the one described by Wilson and Devinney (1971). They generate a light curve from an intensity that is initially calculated from one single equipotential surface relying on the blackbody assumption, even though the atmospheres of real stars have a density distribution. To improve on this initial intensity distribution, Wilson and Devinney apply several multiplicative corrections to take into account effects such as limb darkening, gravity darkening and reflections. We use a self-consistent field technique to generate the detailed density and temperature structure of the components of a close binary star system, then use a hydrodynamics code to evolve the system through several orbital periods, allowing mass transfer. Intensities accross the surfaces of both stars (and the accretion stream, if one exists) are calculated using optical depths in conjunction with an equation of radiative transfer. A two-dimensional surface-brightness image of the binary system and a light-curve is then obtained from these intensities. Also from the hydrodynamics code we have detailed velocity flow fields throughout the structure of both stars (and accretion stream), from which a radial-velocity curve and Doppler tomographic map can be synthesized. This work has been supported in part by NSF grant AST-0407070.

Affiliated with

Also associated with

No associations

Rating

Light Curves, Radial-velocity Curves And Doppler Tomographic Maps Generated From Computationally Modeled, Close Binary Stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Light Curves, Radial-velocity Curves And Doppler Tomographic Maps Generated From Computationally Modeled, Close Binary Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light Curves, Radial-velocity Curves And Doppler Tomographic Maps Generated From Computationally Modeled, Close Binary Stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-993286