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Surface Mapping of Earth-like Exoplanets using Single Point Light Curves
Published on: May 10, 2020
Implications of Tides for Life on Exoplanets
Manasvi Lingam1,2, Abraham Loeb1
11 Harvard-Smithsonian Center for Astrophysics , Cambridge, Massachusetts.
Abstract:
As evident from the nearby examples of Proxima Centauri and TRAPPIST-1, Earth-sized planets in the habitable zone of low-mass stars are common. Here, we focus on such planetary systems and argue that their (oceanic) tides could be more prominent due to stronger tidal forces. We identify the conditions under which tides may exert a significant positive influence on biotic processes including abiogenesis, biological rhythms, nutrient upwelling, and stimulating photosynthesis. We conclude our analysis with the identification of large-scale algal blooms as potential temporal biosignatures in reflectance light curves that can arise indirectly as a consequence of strong tidal forces. Key Words: Tidal effects-Abiogenesis-Biological clocks-Planetary habitability-Temporal biosignatures. Astrobiology 18, 967-982.
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