The Cloudless Nitrogen-Dominated Atmosphere of Hot Jupiter WASP-62b
In the vast inventory of gas giants identified by transit photometry , WASP-62b stands as a rare physical anomaly. Located approximately 575 light-years from the solar system in the constellation Tucana, this massive world defies the typical expectations of deep-atmosphere chemistry. While most gas giants exhibit complex, multi-layered cloud decks composed of silicates or condensed metallic salts, WASP-62b presents a stark, transparent facade to the cosmos. It is classified as a hot Jupiter , locked in a tight, 4.4-day orbital period around a spectral type F star, ensuring that the upper layers of its gaseous envelope remain in a constant state of extreme thermal excitation. Chemical Composition and Transparency The defining feature of WASP-62b is its lack of a significant cloud deck. Spectroscopic analysis, primarily conducted through transmission spectroscopy , reveals a clear signature ...