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Article
On the Possibility to Estimate the Orbital Eccentricity of a Binary System with an Exoplanet from a Transit Light Curve
We study the possibility of determining an orbital eccentricity of a binary star system with an exoplanet from both simulated and observed transit light curves. It has been shown that an exact value of the ecc...
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Article
Investigation of the Effect of the Errors of Limb Darkening Coefficients on the Geometric Parameters of a Binary System with an Exoplanet
Based on the observed light curves of Kepler-5, Kepler-6, Kepler-7, HD 209458, a search was made for the geometric parameters of a binary system with an exoplanet for different values of the limb darkening coe...
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Article
Spots on the Surface of a Star: An Influence on the Estimates of Star–Exoplanet Binary System Parameters
We developed an algorithm to model a light curve observed in a binary system that contains an exoplanet and a host star, on the surface of which there are spots. The spot-caused perturbations in the values of ...
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Article
Influence of Normalization Inaccuracy of Transit Light Curves on the Results of Their Interpretation
Using the transit light curves of Kepler-5b, Kepler-6b, Kepler-7b, Kepler-8b as examples, we study the effect of the primary normalization errors regarding the observed transit light curves of binaries on the ...
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Article
Erratum to: Solution of Kepler’s Equation with Machine Precision
An Erratum to this paper has been published: https://doi.org/10.1134/S1063772921330015
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Article
Solution of Kepler’s Equation with Machine Precision
An algorithm for the numerical solution of Kepler’s equation with machine precision is presented. The convergence of the iterative sequence of Newton’s method is proved for the indicated initial approximation....
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Article
Exoplanet Transients: Possible Variations in the Limb-Darkening Coefficients of Eclipsed Stars at Short Time Intervals
The interpretation of high-precision transit light curves of binary systems with exoplanets Kepler-5b, Kepler-6b, and Kepler-7b is performed for three different epochs. It has been demonstrated that the values...
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Article
Influence of Digital Noise on Interpretation of a Transit Light Curve
The algorithms often used for the interpretation of light curves, such as the frequently applied JKTEBOP algorithm, have limited accuracy, which causes rounding errors, and hence a non-physical contribution to...
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Article
Mechanical means for controlling the geometry of optical spacecraft attitude control systems and the necessary accuracy of these means
The accuracy of modern spacecraft attitude sensors has recently come to exceed the accuracy provided by the rigidity of the mechanical designs of spacecraft. One possible solution to this problem is to introdu...
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Article
The mass of the black hole in the X-ray binary LMC X-1
A dynamical estimate of the mass of the black hole in the LMC X-1 binary system is obtained in the framework of a Roche model for the optical star, based on fitting of the He I 4471 Å and He II 4200 Å absorpti...
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Article
The necessity of introducing a geometric control subsystem into the composite attitude control systems of spacecraft and aircraft with modern precision
We propose to introduce a geometric control subsystem into the attitude control systems of space-craft that would allow the current system sensor configuration to be determined in real time.
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Article
Limb-darkening anomalies in stars eclipsed by exoplanets
The possibility of explaining discrepancies between observed and theoretical limb-darkening coefficients as being a manifestation of the extended, non-spherical atmosphere of an eclipsing exoplanet is analyzed...
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Article
Analysis of light curves of eclipsing systems with exoplanets: HD 189733
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 orb...
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Article
Light curve analysis for eclipsing systems with exoplanets. The system HD 209458
We have analyzed precision light curves for HD 209458, a binary with an exoplanet. The parameters obtained at different epochs and different wavelengths are in good mutual agreement when confidence regions are...
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Article
Estimation of parameter errors in inverse problems. Determining limb-darkening coefficients in classical eclipsing systems
The estimation of parameters and their errors is considered using the observed light curve of the eclipsing binary system YZ Cas as an example. The error intervals are calculated using the differential-correct...
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Article
The mass of the black hole in the X-ray binary M33 X-7 and the evolutionary status of M33 X-7 and IC 10 X-1
We have analyzed the observed radial-velocity curve for the X-ray binary M33 X-7 in a Roche model. We have analyzed the dependence between the component masses and the degree of filling of the optical star’s R...
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Article
The mass of the compact object in the X-ray binary her X-1/HZ her
We have obtained the first estimates of the masses of the components of the Her X-1/HZ Her X-ray binary system taking into account non-LTE effects in the formation of the H γ ab...
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Article
Error estimates for parameters in inverse parametrical problems. Light-curve analysis for classical eclipsing binaries
Parameters and their error intervals numerically estimated for the observed light curve of the binary eclipsing system YZ Cas as well as for one-, two-, three-, and four-parameter functions, and the associated...
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Article
The mass of the compact object in the low-mass X-ray binary 2S 0921-630
We interpret the observed radial-velocity curve of the optical star in the low-mass X-ray binary 2S 0921-630 using a Roche model, taking into account the X-ray heating of the optical star and screening of X-ra...
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Article
Dependence of the absorption-line profiles and radial-velocity curve of the optical star in an X-ray binary on the orbital inclination and component-mass ratio
Theoretical absorption-line profiles and radial-velocity curves for tidally deformed optical stars in X-ray binary systems are calculated assuming LTE. The variations in the profile shapes and radial-velocity ...
