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Evolved Climates and Observational Discriminants for the TRAPPIST-1 Planetary System

  • Authors: Andrew P. Lincowski, Victoria S. Meadows, David Crisp, Tyler D. Robinson, Rodrigo Luger, Jacob Lustig-Yaeger, and Giada N. Arney

2018 The Astrophysical Journal 867 76.

  • Provider: AAS Journals

Caption: Figure 4.

Surface temperatures [K] for every modeled planet and environment combination. Colors represent surface climate: blues are significantly below the freezing point of water, reds are above the runaway greenhouse temperature, and greens are within potentially habitable surface temperatures. The aqua planet environment was only modeled for TRAPPIST-1 e. Venus trace gases have lower boundary values of 30 ppm H2O, 28 ppm SO2, 1 ppm OCS, and photochemical abundances of CO and H2S. Temperate surfaces do not imply habitability due to the inhospitable character of the environmental states, including very low water abundance. Planets in the habitable zone may not necessarily have habitable temperatures.

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