Interpretation of the transit light curve in the presence of one principal minimum taking into account the eccentricity of the transit (planet) orbit
Year: 2024
Type: article
Abstract: Using a high-precision algorithm for interpreting transit light curves in a model of a classical eclipsing binary star-exoplanet system, we investigated the possibility of determining the system parameters in the absence of a priori knowledge of the orbital eccentricity. It was shown that it is impossible to determine the exact value of the eccentricity and periastron longitude based on the main minimum of the transit light curve alone. Also, with an observational accuracy of about 1% of the eclipse depth, the uncertainty in the eccentricity and periastron longitude together causes a significant uncertainty in the values of the component radii (an error of 2–3 times relative to the true values) and the orbital inclination angle. However, the ratios of the system component radii and the limb darkening coefficients are determined with good accuracy. With an increase in the observational accuracy to 0.1% of the eclipse depth, it becomes possible to determine the component radii and the orbital inclination angle when interpreting the light curve taking into account the eccentricity.
Source: Astronomicheskii Zhurnal
Authors: M. K. Abubekerov, N. Yu. Gostev
Institution: Lomonosov Moscow State University
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4405775887