Europlanet Science Congress 2021
Virtual meeting
13 – 24 September 2021
Europlanet Science Congress 2021
Virtual meeting
13 September – 24 September 2021
EPSC Abstracts
Vol. 15, EPSC2021-693, 2021
https://doi.org/10.5194/epsc2021-693
European Planetary Science Congress 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

The first atmospheric characterisation of Wasp-15b with Gaussian Process modelling

Dominique Petit dit de la Roche, Mario van den Ancker, and Paulo Miles Páez
Dominique Petit dit de la Roche et al.
  • European Southern Observatory (ESO), Directorate for Science, Germany (dominique.petitditdelaroche@eso.org)

Wasp-15 b is an inflated hot Jupiter orbiting a bright host star. Its low density and consequent large atmospheric scale height make it an excellent candidate for atmospheric characterization using transmission spectroscopy. In fact, it has previously been observed with the FORS2 spectrograph on the VLT, but large systematics have so far prevented this data from being used. Here, we show that Gaussian Process modelling can remove systematic noise features with amplitudes up to that of the transit signal, allowing us to achieve a precision comparable to later data without the systematics. We present the first transmission spectrum of the atmosphere of Wasp-15 b and compare it to theoretical spectra to discuss the implications.

How to cite: Petit dit de la Roche, D., van den Ancker, M., and Miles Páez, P.: The first atmospheric characterisation of Wasp-15b with Gaussian Process modelling, European Planetary Science Congress 2021, online, 13–24 Sep 2021, EPSC2021-693, https://doi.org/10.5194/epsc2021-693, 2021.

Scientific presentation material

Comments on the scientific presentation material

to access the discussion