Prospects for Extrasolar "Earths" in Habitable Zones

  title={Prospects for Extrasolar "Earths" in Habitable Zones},
  author={Barrie W. Jones and David R. Underwood and Peter Nicholas Sleep},
  journal={arXiv: Astrophysics},
We have shown that Earth-mass planets could survive in variously restricted regions of the habitable zones (HZs) of most of a sample of nine of the 102 main-sequence exoplanetary systems confirmed by 19 November 2003. In a preliminary extrapolation of our results to the other systems, we estimate that roughly a half of these systems could have had an Earth-mass planet confined to the HZ for at least the most recent 1000 Ma. The HZ migrates outwards during the main-sequence lifetime, and so this… Expand
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