Stuttgart 2012 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

EP: Fachverband Extraterrestrische Physik

EP 3: Astrobiologie

EP 3.1: Hauptvortrag

Dienstag, 13. März 2012, 14:00–14:30, V55.02

Pathways to the evolution of Earth-like habitats — •Helmut Lammer — Austrian Academy of Sciences, Space Research Institute, Schmiedlstr. 6, A-8042 Graz, Austria

The atmosphere evolution of early Earth and terrestrial exoplanets which may sustain liquid water oceans and continents where life may originate is discussed. It is shown that the early atmosphere evolution of terrestrial planets depends mainly on the planet's initial volatile contents related to the formation process and is strongly related to a complex interplay of the systems impact history, the weathering time-scales of carbon dioxide into carbonates, as well as the young host star's EUV radiation and plasma outflow induced atmospheric escape processes. It will be shown that the evolutionary pathway to exo-Earth's is much more complex than previously thought. Finally, transit follow-up observations in the UV-range of terrestrial exoplanets around low mass stars with space observatories such as the World Space Observatory-UV (WSO-UV) are discussed because these observations would provide a unique opportunity to shed more light on the early evolution of Earth-like planets, including those of our own Solar System.