M. K. Abubekerov, N. Yu. Gostev, A. M. Cherepashchuk
High-accuracy multicolor light curves of the binary system HD 189733, which
contains an exoplanet, are analyzed. We have determined the radii of the star
and the planet in the binary system, as well as the orbital inclination. The
limb-darkening coefficients of the stellar disk were obtained in 10 filters in
the wavelength interval 5500-10500 AA. The uncertainties of the fitted
parameters were estimated using the differential-correction and confidence-area
methods. The wavelength dependence of the limb-darkening coefficients is
compared to the corresponding theoretical function for a model thin stellar
atmosphere. We confirm the wavelength dependence of the exoplanet's radius
found by Pont et al. The exoplanet radius increases with decreasing wavelength,
which seems to argue for the presence of an atmosphere around the planet.
View original:
http://arxiv.org/abs/1201.4043
No comments:
Post a Comment