9/20/2023 0 Comments Planets compositions![]() ![]() Effects of planetary magnetic field structuring of inner magnetosphere. Atmosphere expansion and mass loss of close-orbit giant exoplanets heated by stellar XUV. Atmospheric Escape From TOI-700 d: Venus versus Earth Analogs. Outgassing history and escape of the martian atmosphere and water inventory. Grid of upper atmosphere models for 1–40 M ⊕ planets: application to CoRoT-7 b and HD 219134 b,c. Habitable zones around main-sequence stars: new estimates. Absolute densities in exoplanetary systems: photodynamical modelling of Kepler-138. The mass of the Mars-sized exoplanet Kepler-138 b from transit timing. ![]() A search for moons around eight M dwarfs. Light curve analysis and announcement of hundreds of new multi-planet systems. Validation of Kepler’s multiple planet candidates. Here we present the results of a detailed study of the Kepler-138 system using 13 Hubble and Spitzer transit observations of the warm-temperate 1.51 ± 0.04 R ⊕ planet Kepler-138 d ( \(\)) is a slightly warmer twin of Kepler-138 d (that is, another water world in the same system) and we infer the presence of Kepler-138 e, a likely non-transiting planet at the inner edge of the habitable zone. This picture is largely corroborated by radial velocity mass measurements for close-in super-Earths but lacks constraints at lower insolations. The population of planets smaller than approximately 1.7 Earth radii ( R ⊕) is widely interpreted as consisting of rocky worlds, generally referred to as super-Earths. ![]()
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