The impact of photospheric brightness field on exoplanetary transit timings and the TTV excess of HD 189733 b

@inproceedings{Baluev2021TheIO,
  title={The impact of photospheric brightness field on exoplanetary transit timings and the TTV excess of HD 189733 b},
  author={Roman V. Baluev},
  year={2021}
}
We consider the issue of excessive TTV noise observed for the exoplanet HD 189733 b. Trying to explain it through the host star photospheric activity, we model the stellar surface brightness as a random field, then characterize statistical properties of the resulting transit signal perturbation and compute individual corrections to transit timings uncertainties. We find that possible effect of the photospheric brightness field can explain only a minor portion (∼ 10 s) of the observed (∼ 70 s… 

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