Titel
Constraints of habitability for the young Earth in a highly eccentric orbit
Autor*in
Helmut Lammer
Space Research Institute, Austrian Academy of Science
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Abstract
Thousands of planets outside the Solar system have been discovered, with exoplanets in different environments. Since we cannot expect to find an exoplanetary system fully resembling our Solar System, we consider a Solar System type configuration where the Earth moves in an eccentric orbit. We focus on young Earth 1 billion years ago, when the Sun’s extreme UV (EUV) flux was about 5 times higher than the current radiation. In case of eccentric motion of Earth, strong variations of the EUV flux would influence the evolution of the planet’s atmosphere (EUV radiation of 50 times the current EUV flux would be possible). Taking into account a certain amount of Nitrogen in the atmosphere of such a young Earth, we study the non-thermal loss of N2 over a long time interval. We therefore investigate to what extent eccentric motion will influence the conditions of habitability of a terrestrial planet.
Stichwort
Young Eartheccentric motionEUV fluxNitrogen loss
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
phaidra.univie.ac.at/o:1433276
Erschienen in
Titel
Proceedings of the International Astronomical Union
Band
14
Ausgabe
S345
ISSN
1743-9213
Erscheinungsdatum
2018
Seitenanfang
358
Seitenende
359
Publication
Cambridge University Press (CUP)
Fördergeber
Austrian Science Fund (FWF) — S11601-N16
Austrian Science Fund (FWF) — S11608-N16
Austrian Science Fund (FWF) — S11607-N16
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Erscheinungsdatum
2018
Zugänglichkeit
Rechte
Rechteangabe
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