The Transit and Light Curve Modeller
| Autor: | Csizmadia, Szilard |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Extrasolare Planeten und Atmosphären
Physics Source code 010504 meteorology & atmospheric sciences media_common.quotation_subject Binary number stars: eclipsing techniques: radial velocities Brown dwarfs photometry transiting exoplanets planets exoplanets Astronomy and Astrophysics Light curve 01 natural sciences Exoplanet Computational physics Radial velocity Relativistic beaming Space and Planetary Science Limb darkening 0103 physical sciences Reflection (physics) Astrophysics::Earth and Planetary Astrophysics 010303 astronomy & astrophysics 0105 earth and related environmental sciences media_common |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 496:4442-4467 |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/staa349 |
| Popis: | Transit and Light Curve Modeller (TLCM), a computer code with the purpose of analysing photometric time series of transits simultaneously with the out-of-transit light variations and radial velocity curves of transiting/eclipsing binary systems, is presented here. Joint light-curve and radial velocity fits are possible with it. The code is based on the combination of a genetic algorithm and simulated annealing. Binning, beaming, reflection, and ellipsoidal effects are included. Both objects may have their own luminosities and therefore one can use TLCM to analyse the eclipses of both exoplanet and well-detached binary systems. A simplified Rossiter–McLaughlin effect is included in the radial velocity fit, and drifts and offsets of different instruments can also be fitted. The impact of poorly known limb darkening on the Rossiter–McLaughlin effect is shortly studied. TLCM is able to manage red-noise effects via wavelet analysis. It is also possible to add parabolic or user-defined baselines and features to the code. I also predict that light variations due to beaming in some systems exhibiting radial velocity drift should be observed by, e.g. PLATO. The fit of the beaming effect is improved by invoking a physical description of the ellipsoidal effects, which has an impact on the modelling of the relativistic beaming; I also point out the difficulties that are stemming from the fact that beaming and first-order reflection effects have the same form of time dependence. Recipe is given, which describes how to analyse grazing transit events. The code is freely available. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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