Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aipc..713..123p&link_type=abstract
THE SEARCH FOR OTHER WORLDS: Fourteenth Astrophysics Conference. AIP Conference Proceedings, Volume 713, pp. 123-126 (2004).
Astronomy and Astrophysics
Astrophysics
3
Pre-Main Sequence Objects, Young Stellar Objects And Protostars, Accretion And Accretion Disks, Surface Features, Luminosities, Magnitudes, Effective Temperatures, Colors, And Spectral Classification
Scientific paper
The Classical T Tauri Star AA Tau shows quasi cyclic variations of brightness and polarization with a maximum polarization when the system is faintest. Bouvier et al. proposed a model where these variations should be ``eclipses'' produced by orbiting circumstellar material. The effects of a warp at the inner edge of the accretion disk and of hot spots on the stellar surface on the photometric and polarimetric light curves of AA Tau are studied through multiple scattering Monte-Carlo simulations. Constraints on disk parameters are drawn out, so as to determine whether the warp can be interpreted within the magnetospheric accretion theory. We find that the main features of AA Tau's photopolarimetric variations can be explained by the presence of a warp and that hot spots have a limited influence on them.
Menard Francois
Pinte Christophe
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