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

Exoplanets with relatively clear atmospheres are prime targets for detailedstudies of chemical compositions and abundances in their atmospheres. Alkalimetals have long been suggested to exhibit broad wings due to pressurebroadening, but most of the alkali detections only show very narrow absorptioncores, probably because of the presence of clouds. We report the strongdetection of the pressure-broadened spectral profiles of Na, K, and Liabsorption in the atmosphere of the super-Neptune WASP-127b, at 4.1$\sigma$,5.0$\sigma$, and 3.4$\sigma$, respectively. We performed a spectral retrievalmodeling on the high-quality optical transmission spectrum newly acquired withthe 10.4 m Gran Telescopio Canarias (GTC), in combination with the re-analyzedoptical transmission spectrum obtained with the 2.5 m Nordic Optical Telescope(NOT). By assuming a patchy cloudy model, we retrieved the abundances of Na, K,and Li, which are super-solar at 3.7$\sigma$ for K and 5.1$\sigma$ for Li (andonly 1.8$\sigma$ for Na). We constrained the presence of haze coverage to bearound 52%. We also found a hint of water absorption, but cannot constrain itwith the global retrieval owing to larger uncertainties in the probedwavelengths. WASP-127b will be extremely valuable for atmosphericcharacterization in the era of James Webb Space Telescope.

The GTC exoplanet transit spectroscopy survey IX. Detection of Haze, Na, K, and Li in the super-Neptune WASP-127b