IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
UV biological constrains for habitable zones
Autor/es:
BUCCINO, A. P.; MAUAS, P. J. D.; LEMARCHAND, G. A.
Lugar:
Colonia, Uruguay
Reunión:
Taller; Tercer Taller de Ciencias Planetarias; 2006
Resumen:
Ultraviolet radiation is known to inhibit photosynthesis,
induce DNA destruction and cause damage to a wide variety of
proteins and lipids. In particular, UV radiation between 200-300 nm
becomes energetically very
damaging to most of the terrestrial biological systems.
On the other hand, UV radiation is usually considered one of the most
important energy source on the
primitive Earth for the synthesis of many biochemical compounds and,
therefore, essential for several biogenesis
processes. In this work, we use these properties of the UV radiation to
define the bounderies of an
ultraviolet habitable zone.
We also analyze the evolution of the
UV habitable zone during the main sequence stage of the
star.
We apply these criteria to study the UV habitable zone for those
extrasolar planetary systems that were observed by the
International Ultraviolet Explorer (IUE). We analyze the
possibility that
extrasolar planets and moons could be suitable for life, according to
the UV constrains presented in this work and other
accepted criteria of habitability (liquid water, orbital stability,
etc.).