English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The detection and characterization of exoplanet atmospheres is currently oneof the main drivers pushing the development of new observing facilities. Inthis context, high-resolution spectrographs are {proving} their potential andshowing that high-resolution spectroscopy will be paramount in this field. Weaim to make use of ESPRESSO high-resolution spectra, which cover two transitsof HD209458b, to probe the broadband transmission optical spectrum of theplanet. We applied the chromatic Rossiter-McLaughin method to derive thetransmission spectrum of HD209458b. We compared the results with previous HSTobservations and with synthetic spectra. We recover a transmission spectrum ofHD209458b similar to the one obtained with HST data. The models suggest thatthe observed signal can be explained by only Na, only TiO, or both Na and TiO,even though none is fully capable of explaining our observed transmissionspectrum. Extra absorbers may be needed to explain the full dataset, thoughmodeling approximations and observational errors can also be responsible forthe observed mismatch. Using the chromatic Rossiter-McLaughlin technique,ESPRESSO is able to provide broadband transmission spectra of exoplanets fromthe ground, in conjunction with space-based facilities, opening goodperspectives for similar studies of other planets.

Broadband transmission spectroscopy of HD209458b with ESPRESSO: Evidence for Na, TiO, or both