ultraviolet radiation from F and K stars and implications for planetary habitability

@article{Kasting2004ultravioletRF,
  title={ultraviolet radiation from F and K stars and implications for planetary habitability},
  author={James F Kasting and Douglas C. B. Whittet and William R. Sheldon},
  journal={Origins of life and evolution of the biosphere},
  year={2004},
  volume={27},
  pages={413-420}
}
Now that extrasolar planets have been found, it is timely to ask whether some of them might be suitable for life. Climatic constraints on planetary habitability indicate that a reasonably wide habitable zone exists around main sequence stars with spectral types in the early-F to mid-K range. However, it has not been demonstrated that planets orbiting such stars would be habitable when biologically-damaging energetic radiation is also considered. The large amounts of UV radiation emitted by… 

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References

SHOWING 1-10 OF 18 REFERENCES
Habitable moons around extrasolar giant planets
TLDR
It is argued that rocky moons orbiting these companions could be habitable if the planet–moon system orbits the parent star within the so-called 'habitable zone'10, where life-supporting liquid water could be present.
Habitable zones around main sequence stars.
TLDR
The results suggest that mid-to-early K stars should be considered along with G stars as optimal candidates in the search for extraterrestrial life.
Search for primitive life on a distant planet: relevance of O2 and O3 detections
Considering the future importance of the search for evidence of primitive life on a distant planet, we have revisited some points of the O 2 and O 3 detection criteria. The budget of free oxygen and
Urey Prize Lecture: On the Diversity of Plausible Planetary Systems
Abstract Models of planet formation and of the orbital stability of planetary systems are used to predict the variety of planetary and satellite systems that may be present within our galaxy. A new
Stabilization of the Earth's obliquity by the Moon
ACCORDING to Milankovitch theory1,2, the ice ages are related to variations of insolation in northern latitudes resulting from changes in the Earth's orbital and orientation parameters (precession,
A Jupiter-mass companion to a solar-type star
The presence of a Jupiter-mass companion to the star 51 Pegasi is inferred from observations of periodic variations in the star's radial velocity. The companion lies only about eight million
Theoretical constraints on oxygen and carbon dioxide concentrations in the Precambrian atmosphere.
  • J. Kasting
  • Geology, Medicine
    Precambrian research
  • 1987
TLDR
Climate models suggest that carbon dioxide concentrations during the Archean must have been at least 100-1000 times the present level to keep the Earth's surface temperature above freezing in the face of decreased solar luminosity, but periods of extensive glaciation during the early and late Proterozoic indicate that the climate at these times was relatively cool.
The evolution and variability of atmospheric ozone over geological time
Abstract The rise of atmospheric O 3 as a function of the evolution of O 2 has been investigated using a one-dimensional steady-state photochemical model based on the chemistry and photochemistry of
Bacterial resistance to ultraviolet irradiation under anaerobiosis: implications for pre-phanerozoic evolution.
TLDR
Since adequate ultraviolet protection mechanisms evolved early, the late Proterozoic appearance of Metazoa probably was not related to high fluxes of solar ultraviolet radiation.
The evolution of atmospheric ozone
A one-dimensional coupled chemistry and flow model of the earth's atmosphere is used to study the relationship between ozone content and oxygen level. The effects of the biogenic trace gases methane
...
1
2
...