CLEANING THE TESS OBSERVATIONS OF WASP-33 B TRANSITS FROM THE HOST STAR PHOTOMETRIC VARIABILITY
Section: EXOPLANETS
Abstract and keywords
Abstract (English):
Based on the TESS observations of a $\delta$ Scuti variable WASP-33 obtained in 2019 and 2022, we thoroughly investigate the power spectrum of its photometric flux and construct a statistically exhaustive model for its variation. This model contains 30 robustly justified harmonics, the red noise, and quasiperiodic noise components. This compound model allows us to greatly improve the transit timing accuracy of the exoplanet WASP-33 b. The rms of its transit timing variation residuals is drastically reduced by a factor of 3.5, from 63 s to 18 s.

Keywords:
techniques: photometric; stars: variables: delta Scuti; stars: individual: WASP-33; planets and satellites: detection
Text
Text (PDF): Read Download
References

1. Chakrabarty A. and Sengupta S., 2019, Astronomical Journal, 158, p. 39

2. Herrero E., Morales J.C., Ribas I., et al., 2011, Astronomy and Astrophysics, 526, L10

3. von Essen C., Czesla S., Wolter U., et al., 2014, Astronomy and Astrophysics, 561, A48

4. von Essen C., Mallonn M., Borre C.C., et al., 2020, Astronomy and Astrophysics, 639, A34

Login or Create
* Forgot password?