Improvements on analytic modelling of stellar spots

Abstract

In this work we present the solution of the stellar spot problem using the Kelvin-Stokes theorem. Our result is applicable for any given location and dimension of the spots on the stellar surface. We present explicitely the result up to the second degree in the limb darkening law. This technique can be used to calculate very efficiently mutual photometric effects produced by eclipsing bodies occulting stellar spots and to construct complex spot shapes.

arXiv commentResubmitted to MNRAS after accounting for minor comments of second review, 9 pages, 5 figures, software available at http://eduscisoft.com/KSINT/

References in corpus (7)

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• Light curve modelling for mutual transits
• Photospheric activity, rotation, and radial velocity variations of the planet-hosting star CoRoT-7
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• Starspot occultations in infrared transit spectroscopy: the case of WASP-52b
• $\text{PyTranSpot}$ - A tool for multiband light curve modeling of planetary transits and stellar spots
• Stellar Magnetic Activity and "Butterfly Diagram" of Kepler-63
• SAGE: A tool to constrain impacts of stellar activity on transmission spectroscopy
• Disentangling planetary and stellar activity features in the CoRoT-2 light curve
• Hiding in plain sight: observing planet-starspot crossings with the James Webb Space Telescope
• Simulations of starspot anomalies within TESS exoplanetary transit light curves -- I. The detection limits of starspot anomalies in TESS light curves
• Simulations of starspot anomalies within TESS exoplanetary transit light curves -- II
• Correcting the effect of stellar spots on ARIEL transmission spectra II.The limb darkening effect
• Quantifying the Impact of Starspot-Crossing Events on Retrieved Parameters from Transit Lightcurves
• Stellar activity and transits
• The impact of photospheric brightness field on exoplanetary transit timings and the TTV excess of HD 189733 b