Tootfinder

The SPACE Program I: The featureless spectrum of HD 86226 c challenges sub-Neptune atmosphere trends
K. Angelique Kahle (Max Planck Institute for Astronomy, Department of Physics and Astronomy, Heidelberg University), Jasmina Blecic (Department of Physics, New York University Abu Dhabi, Center for Astrophysics and Space Science), Reza Ashtari (JHU Applied Physics Laboratory), Laura Kreidberg (Max Planck Institute for Astronomy), Yui Kawashima (Department of Astronomy, Graduate School o…

The SPACE Program I: The featureless spectrum of HD 86226 c challenges sub-Neptune atmosphere trends
Sub-Neptune exoplanets are the most abundant type of planet known today. As they do not have a Solar System counterpart, many open questions exist about their composition and formation. Previous spectroscopic studies rule out aerosol-free hydrogen-helium-dominated atmospheres for many characterized sub-Neptunes but are inconclusive about their exact atmospheric compositions. Here we characterize the hot (Teq=1311K) sub-Neptune HD 86226 c, which orbits its G-type host star. Its high equilibrium …