Transmission spectroscopy of sub-Neptunes was expected to reveal their compositions and hence origins, yet many show flat near- to mid-infrared spectra.
TOI-776 c
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
JWST COMPASS: NIRSpec/G395H Transmission Observations of TOI-776 c, a 2 Rearth [Earth radius] M Dwarf Planet
The atmospheres of planets between the size of Earth and Neptune at short orbital periods have been under intense scrutiny.