2025/01/31 by M. J. Way, Way, M. J. · 2 voices · 1 citation
Medicine · Physics and Astronomy · #Earth and Planetary Astrophysics (astro-ph.EP) #FOS: Physical sciences #Planetary Science and Exploration #Space Science and Extraterrestrial Life #Spaceflight effects on biology #astro-ph.EP
paper · pdf · doi:10.48550/arxiv.2502.00132
openalex publication_date 2025/01/31 · arxiv published 2025/01/31 · arxiv updated 2025/01/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
TRAPPIST-1 d is generally assumed to be at the boundary between a Venus-like world and an Earth-like world, although recently published works on TRAPPIST-1 b and c raise concerns that TRAPPIST-1 d may be similarly devoid of a substantial atmosphere. TRAPPIST-1 d is also relatively understudied in comparison with TRAPPIST-1 e. The latter has generally appeared to be within the habitable zone of most atmospheric modeling studies. Assuming that TRAPPIST-1 d still retains a substantial atmosphere, we demonstrate via a series of 3D general circulation model experiments using a dynamic ocean that the planet could reside within the habitable zone in a narrow parameter space. At the same time, it could also be an exo-Venus or exo-Dead-type world or in transition between between one of these. Studies like this can help distinguish between these types of worlds.