The University of Montreal have put out a press release about a study of ultra-hot-Jupiter WASP-76b. The work, published in Nature by Stefan Pelletier et al, is based on observations with the 8-m Gemini-North telescope.

Pelletier et al measure the abundances of elements in the atmosphere of WASP-76b and compare them to abundances in the Sun.

Elements with condensation temperatures below 1550 K match solar abundances. Elements with higher condensation temperatures appear to be severely depleted. This is likely because they are “cold trapped”, condensed on the night-side of the planet, which, facing away from its host star, is much colder. The work has been widely reported in the media.