Email this article Characteristics of Exoplanets in Transiting Systems HD 189733 and HD 209458: Taking into Account the Four-Parameter Law of Star Darkening Within the Framework of a Three-Dimensional Model of Its Atmosphere
- Authors: Bekesov E.V.1
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Affiliations:
- Lomonosov Moscow State University, Sternberg Astronomical Institute
- Issue: Vol 102, No 9 (2025)
- Pages: 810-820
- Section: Articles
- URL: https://rjmseer.com/0004-6299/article/view/695914
- DOI: https://doi.org/10.31857/S0004629925090063
- ID: 695914
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Abstract
The paper presents an analysis of high-precision satellite light curves of exoplanets HD 189733 b and HD 209458 b. The dependence of the exoplanet radius on the wavelength caused by scattering in the planetary atmosphere is determined using a four-parameter limb darkening law based on a three-dimensional model of the stellar atmosphere. It is shown that when using the same exoplanet system characteristics for all wavelengths, primarily the orbital inclination, as well as when using a four-parameter law with a refined radius of the star, the change in the radius of the exoplanet HD 189733 b with increasing corresponds to the model of an exponential Rayleigh atmosphere with a characteristic height of 380400 km. At the same time, the characteristics of the atmosphere of HD 209458 b largely depend on the adopted eccentricity of the system.
Keywords
About the authors
E. V. Bekesov
Lomonosov Moscow State University, Sternberg Astronomical Institute
Email: egor03121996@mail.ru
Moscow, Russia
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