GJ436 b Archives

Calculated vertical distribution of abundances for the warm Neptunes GJ 436b and GJ 1214b. The solid lines correspond to the mean abundance, the shaded areas to the range around the mean ±σ, and the dotted lines to the abundances resulting from the unperturbed model. The panels on the left show the effect on the calculated abundances of the uncertainties on (photo)chemical kinetics, while the right panels correspond to the effect on the abundances of the uncertainty in Kzz. -- astro-ph.EP

Astrochemistry, Astrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report

Quantification Of Abundance Uncertainties In Chemical Models Of Exoplanet Atmospheres

by Keith CowingDecember 4, 2025December 4, 2025

Chemical models are routinely used to predict the atmospheric composition of exoplanets and compare it with the composition retrieved from observations, but little is known about the reliability of the […]

Differential intensities of Galactic cosmic rays as a function of cosmic ray kinetic energy at different heights in an exoplanet atmosphere for a GJ436 b-like exoplanet at a = 0.2 au in the GJ436 system (from Rodgers-Lee et al. 2023). -- astro-ph.SR

Astrochemistry, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Gaia - Planetary Perspectives, Habitable Zones, Space Weather & Heliophysics, Status Report

Stellar Energetic Particle And Cosmic Ray Effects In Exoplanetary Atmospheres

by Keith CowingSeptember 12, 2024September 12, 2024

Energetic particles, in the form of stellar energetic particles and cosmic rays, can lead to disequilibrium chemical effects in exoplanetary atmospheres. In Earth-like atmospheres, energetic particles can drive the formation […]

GJ436 b

Quantification Of Abundance Uncertainties In Chemical Models Of Exoplanet Atmospheres

Stellar Energetic Particle And Cosmic Ray Effects In Exoplanetary Atmospheres

Opportunity to Contribute to NASA DARES Community White Paper on Phototrophic Biosignatures

NASA Establishes Mars Forward Operational Risk and Contamination Evaluation (M-FORCE) Tiger Team to Shape Mars Planetary Protection Protocols

Miraflores Butte On Mars

Ocean World Exploration: 2026 American Samoa ROV + Mapping Exploration

Development Of An Adaptive Optics Testbed At MPIA For The ELT/Planetary Camera And Spectrograph (PCS)