KELT-11 b Archives - Astrobiology

Model spectra (top) and Kp-voffset maps for the combination of all nights (bottom) of H2O, H2S, and CH4 for KELT-11 b. The grey shaded areas show the wavelength regions of the spectral orders used for the analysis. The dotted lines indicate the expected location of the planetary signal. -- astro-ph.EP

Astrochemistry, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Status Report

Upper Limits On Atmospheric Abundances Of KELT-11b And WASP-69b From A Retrieval Approach

by Keith CowingNovember 11, 2025November 11, 2025

WASP-69b and KELT-11b are two low-density hot Jupiters, which are expected to show strong atmospheric features in their transmission spectra.

Hovmoller plots showing the time evolution of meridional wind velocity v as a function of pressure for the simulated hot planet (HP) and warm planet (WP) at the substellar point (λ, ϕ) = (0◦, 0◦) (left) and mid-latitudes (λ, ϕ) = (0◦, 45◦) (right) with red and blue colors corresponding to northward and southward flow, respectively. Both planets exhibit oscillations in their equatorial regions with a period of ≲3 τp and a downward propagation in time, as illustrated by red arrows. The HP has higher amplitude and more clear oscillations in v compared to the WP. Rossby waves appear as oscillations in the deep regions of both planets at (λ, ϕ) = (0◦, 45◦). -- astro-ph.EP

Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Gas Giants, Habitable Zones, Imaging & Spectroscopy, Status Report

Bridging The Atmospheric Circulations Of Hot And Warm Giant Exoplanets

by Keith CowingMay 7, 2025May 7, 2025

We perform high-resolution atmospheric flow simulations of hot and warm giant exoplanets that are tidally locked.