Atmospheric Chemistry of Secondary and Hybrid Atmospheres of Super Earths and Sub-Neptunes

• Published in: The Astrophysical journal Vol. 963; no. 2; pp. 157 - 183
• Main Authors: Tian, Meng, Heng, Kevin
• Format: Journal Article
• Language: English
• Published: Philadelphia The American Astronomical Society 01.03.2024; IOP Publishing
• Subjects: Activity coefficients; Atmosphere; Atmospheric chemistry; Atmospheric pressure; Carbon dioxide; Carbon monoxide; Exoplanet atmospheres; Exoplanet atmospheric composition; Exoplanets; Extrasolar planets; Fugacity; Gases; Helium; Hydrogen; Magma; Mathematical analysis; Nitrogen content; Outgassing; Oxidation; Oxygen; Photochemistry; Planetary mantles; Pressure; Solar system; Space telescopes; Stellar planets; Sulfidation; Surface pressure; Venus; Venus atmosphere

The atmospheres of small exoplanets likely derive from a combination of geochemical outgassing and primordial gases left over from formation. Secondary atmospheres, such as those of Earth, Mars, and Venus, are sourced by outgassing. Persistent outgassing into long-lived, primordial, hydrogen–helium...