UV radiation as biologic limit in the origin and development of life in extrasolar planets

Abstract

In this work, we displayed a new biological criterion that restricts the traditional habitable zone. We set the internal boundary of this new UV habitable zone from the maximum radiation that tolerates the DNA and its external boundary from the levels of UV radiation needed in the biogenesis processes. We also analyzed the evolution of the habitable zones according to the variation of the stellar luminosity throughout the main sequence stage. We evaluated these criteria in those planetary stars that were observed by IUE satellite. FULL TEXT IN SPANISH