Constraints of habitability for the young Earth in a highly eccentric orbit

Elke Pilat-Lohinger, Kristina G. Kislyakova, Helmut Lammer, Colin P. Johnstone, David Bancelin, Ákos Bazsó, Bruce G. Elmegreen, L. Viktor Tóth, Manuel Güdel

Research output: Contribution to journalArticle


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.

Original languageEnglish
Pages (from-to)358-359
Number of pages2
JournalProceedings of the International Astronomical Union
Publication statusAccepted/In press - Jan 1 2019



  • eccentric motion
  • EUV flux
  • Nitrogen loss
  • Young Earth

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science

Cite this

Pilat-Lohinger, E., Kislyakova, K. G., Lammer, H., Johnstone, C. P., Bancelin, D., Bazsó, Á., Elmegreen, B. G., Tóth, L. V., & Güdel, M. (Accepted/In press). Constraints of habitability for the young Earth in a highly eccentric orbit. Proceedings of the International Astronomical Union, 358-359.