Abstract
The evolution of Earth-like habitable planets is a complex process that depends on the geodynamical and geophysical environments. In particular, it is necessary that plate tectonics remain active over billions of years. These geophysically active environments are strongly coupled to a planet's host star parameters, such as mass, luminosity and activity, orbit location of the habitable zone, and the planet's initial water inventory. Depending on the host star's radiation and particle flux evolution, the composition in the thermosphere, and the availability of an active magnetic dynamo, the atmospheres of Earth-like planets within their habitable zones are differently affected due to thermal and nonthermal escape processes. For some planets, strong atmospheric escape could even effect the stability of the atmosphere.
| Original language | English |
|---|---|
| Pages (from-to) | 45-68 |
| Number of pages | 24 |
| Journal | Astrobiology |
| Volume | 10 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 Jan 2010 |
Bibliographical note
The authors acknowledge the Helmholtz-Gemeinschaft, as this research has been supported by the Helmholtz Association through the research alliance “Planetary Evolution and Life,” the International Space Science Institute (ISSI, Bern, Switzerland) and the ISSI teams “Evolution of Habitable Planets” and “Evolution of Exoplanet Atmospheres and Their Characterization.” The authors also acknowledge fruitful discussions during various meetings related to the Europlanet N2 activities as well as within the N2 Discipline working groups DWG 4 and DWG 5. Furthermore, we acknowledge support by the Austrian Academy of Sciences, “Verwaltungsstelle für Auslandsbeziehungen,” and by the Russian Academy of Sciences (RAS), Russian Federation. We thank also NASA for support via NAG5-13045 at the Harvard Smithsonian Center for Astrophysics, USA. Furthermore, we acknowledge the Austrian FWF (Wissenschaftsfond) for supporting this work via the following projects: P20145-N16 and FWF-RFBR I 199-N16; N6, 09-02-91002-ANF-a.Keywords
- Atmosphere evolution
- Geophysics
- Habitability
- Terrestrial planets
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