Eclipsing binaries as a test for synthetic photometry
Abstract
Narrow band photometry is a viable tool to characterize large numbers of stars. The connection between observed colors and astrophysical parameters has to rely on synthetic photometry calculated from stellar atmosphere models. Here, we present synthetic Hbeta indices calculated from 1D model atmospheres, which implement various treatments of convection. The calculated indices are transformed to the standard system using observed medium-resolution spectra from recently published stellar libraries. We test how well the synthetic photometry reproduces observed indices by using a number of eclipsing binary systems. For these stars, atmospheric parameters can be determined independently from the models with highest possible accuracy. As a preliminary conclusion, the computed indices deviate from the observed ones by an amount expected from the observational errors and the accuracy of the atmospheric parameters.
- Publication:
-
Binary Stars as Critical Tools & Tests in Contemporary Astrophysics
- Pub Date:
- August 2007
- Bibcode:
- 2007IAUS..240..328H