| Issue |
A&A
Volume 633, January 2020
|
|
|---|---|---|
| Article Number | A96 | |
| Number of page(s) | 6 | |
| Section | Numerical methods and codes | |
| DOI | https://doi.org/10.1051/0004-6361/201936731 | |
| Published online | 16 January 2020 | |
High-precision calculation of the light curve and its interpretation
Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow, Russia
e-mail: ngostev@sai.msu.ru
Received:
18
September
2019
Accepted:
27
November
2019
We present a highly precise calculation of the theoretical light curve and its derivatives for a binary star-planet system in an elliptical orbit. We also describe an analytical fitting by limb-darkening coefficients to reduce the number of parameters for nonlinear fitting. We demonstrate the practical importance of the precision computation of theoretical light curves through the example of the interpretation of the light curve of HD 209458 and the synthetic light curve. We also compare the results obtained using our algorithm to those provided by a lower-precision algorithm to demonstrate the benefits of computing with a higher precision. We discuss the capability of making more accurate conclusions concerning the agreement of the observed light curve with the adopted model.
Key words: methods: analytical / methods: data analysis / methods: numerical / methods: statistical / methods: observational / binaries: eclipsing
© ESO 2020
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