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Modelling the TESS light curve of Ap Si star MX TrA
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Modelling the TESS light curve of Ap Si star MX TrA
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The TESS light curve of the silicon Ap star MX TrA was modelled using the observational surface distribution of silicon, iron, helium, and chromium obtained previously with the Doppler Imaging technique. The theoretical light curve was calculated using a grid of synthetic fluxes from line-by-line stellar atmosphere models with individual chemical abundances. The observational TESS light curve was fitted by synthetic one with an accuracy better than 0.001~mag. The influence of Si and Fe abundance stratification on the amplitude of variability was estimated. Also the wavelength dependence of the photometric amplitude and phase of the maximum light was modelled showing the typical for Ap Si stars behaviour with increased amplitude and anti-phase variability in far ultraviolet caused by the flux redistribution.
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Cited by 1 Pith paper
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Selected Results on Variable Stars Observed by TESS
A curated review of TESS-era results across the major classes of variable stars, with illustrative light curves, but with no new observational or theoretical result.
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