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Stellar Variability of Known Hosts Observed by TESS


As long as astronomers have searched for exoplanets, the intrinsic variability of host stars has interfered with the ability to reliably detect and confirm exoplanets. In this thesis, I will give an overview of how stellar variability affects the way astronomer's perceive planets as well as how they affect their planets directly. I first present the results of a photometric data analysis for the known planet hosting star, BD-06~1339, observed by the Transiting Exoplanet Survey Satellite (TESS) during Sector 6 at 2 minute cadence. I discuss evidence that suggests the observed 3.9 day periodic radial velocity signature may be caused by stellar activity rather than a planetary companion, since variability detected in the photometric data are consistent with the periodic signal. I will then conduct a population study of known hosts observed by TESS and discuss both correlations and unique targets that call these variable stars their home.

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