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The Transit and Light Curve Modeller

Csizmadia, Szilard (2020) The Transit and Light Curve Modeller. Monthly Notices of the Royal Astronomical Society, 496 (4), pp. 4442-4467. Oxford University Press. doi: 10.1093/mnras/staa349. ISSN 0035-8711.

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Official URL: https://academic.oup.com/mnras/article/496/4/4442/5731867

Abstract

ransit 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.

Item URL in elib:https://elib.dlr.de/137180/
Document Type:Article
Title:The Transit and Light Curve Modeller
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Csizmadia, Szilardszilard.csizmadia (at) dlr.dehttps://orcid.org/0000-0001-6803-9698
Date:February 2020
Journal or Publication Title:Monthly Notices of the Royal Astronomical Society
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:496
DOI :10.1093/mnras/staa349
Page Range:pp. 4442-4467
Publisher:Oxford University Press
ISSN:0035-8711
Status:Published
Keywords:stars: eclipsing techniques: radial velocities Brown dwarfs photometry transiting exoplanets planets exoplanets
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project PLATO (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Deposited By: Csizmadia, Szilard
Deposited On:06 Nov 2020 10:24
Last Modified:06 Nov 2020 10:24

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