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, EPSC2021-856, 2021
https://doi.org/10.5194/epsc2021-856
European Planetary Science Congress 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Retrieving the transmission spectrum of HD 209458b usingCHOCOLATE: a new Chromatic Doppler Tomography technique

Emma Esparza-Borges1,2, Mahmoud Oshagh1,2, Nuria Casasayas-Barris3, and Enric Pallé1,2
Emma Esparza-Borges et al.
  • 1Instituto de Astrofísica de Canarias (IAC), 38205 La Laguna, Tenerife, Spain
  • 2Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain
  • 3Leiden Observatory, Leiden University, Postbus 9513, 2300 RA Leiden, The Netherlands

Multi-band photometric transit observations or low resolution spectroscopy (spectro-photometry) are normally used to retrieve the broadband transmission spectra of transiting exoplanets in order to assess the chemical composition of their atmospheres. In this work, we present an alternative approach for recovering the broadband transmission spectra using chromatic Doppler Tomography. To validate the method and examine its performance, we used new observational data obtained with the ESPRESSO instruments to retrieve the  transmission spectra of the archetypal hot Jupiter HD209458b. Our findings indicate that the recovered transmission spectrum is in good agreement with the results presented in previous studies, which used different methodologies to extract the spectrum.

How to cite: Esparza-Borges, E., Oshagh, M., Casasayas-Barris, N., and Pallé, E.: Retrieving the transmission spectrum of HD 209458b usingCHOCOLATE: a new Chromatic Doppler Tomography technique, European Planetary Science Congress 2021, online, 13–24 Sep 2021, EPSC2021-856, https://doi.org/10.5194/epsc2021-856, 2021.

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