substellar object Archives

Diagram of the MSG model algorithm for cloudy substellar atmospheres. The boxes with a dashed outline indicate parameters that are inputs to the model. The boxes with a dotted outline indicate control processes within the workflow. For a detailed explanation of the cloud formation process, see section 2. For a detailed explanation of the control process, see section 4.3. For the convergence criteria considered under the control process see section 4.1 -- astro-ph.EP

Astronomy & Telescopes, Atmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

The MSG Model For Cloudy Substellar Atmospheres: A Grid Of Self-consistent Substellar Atmosphere Models With Microphysical Cloud Formation

by Keith CowingJanuary 22, 2025January 22, 2025

State-of-the-art JWST observations are unveiling unprecedented views into the atmospheres of substellar objects in the infrared, further highlighting the importance of clouds. Current forward models struggle to fit the silicate […]

Simulated thermal emission spectra from 0.6 to 15 µm of a CARMA model, EddySed models with various Scloud values and different fractions of the cloud mass mixing ratio, and a cloud-free model for a Y dwarf with Teff = 175 K, log(g) = 4.5 and fsed = 6. The inset highlights the region of interest between 3.5 - 6 µm. -- astro-ph.EP

Atmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Habitable Zones, Icy Worlds, Imaging & Spectroscopy, Status Report, Water/Hycean Worlds & Oceanography

Microphysical Prescriptions for Parameterized Water Cloud Formation on Ultra-cool Substellar Objects

by Keith CowingAugust 20, 2024

Water must condense into ice clouds in the coldest brown dwarfs and exoplanets. When they form, these icy clouds change the emergent spectra, temperature structure, and albedo of the substellar […]