Bio-habitability and life on planets of M-G-type stars
Abstract
The recent detection of Earth-sized planets in the habitable zone of Proxima Centauri, Trappist-1, and many other nearby M-type stars (which consist some 75% of the stars) has led to speculations, whether liquid water and life actually exist on these planets. Defining the bio-habitable zone, where liquid water and complex organic molecules can survive on at least part of the planetary surface, we suggest that planets orbiting M-type stars may have life-supporting conditions for a wide range of atmospheric properties (Wandel2018). We extend this analysis to synchronously orbiting planets of K- and G-type stars and discuss the implications for the evolution and sustaining of life on planets of M- to G-type stars, in analogy to Earth.
- Publication:
-
Origins: From the Protosun to the First Steps of Life
- Pub Date:
- 2020
- DOI:
- Bibcode:
- 2020IAUS..345..189W
- Keywords:
-
- Habitable Zone;
- exoplanets;
- M-type stars;
- climate mode