Ultraviolet radiation constraints around the circumstellar habitable zones
نویسندگان
چکیده
منابع مشابه
Ultraviolet Radiation Constraints around the Circumstellar Habitable Zones
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 sy...
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During the last decade there was a change in paradigm, which led to consider that terrestrial-type planets within liquid-water habitable zones (LW-HZ) around M stars can also be suitable places for the emergence and evolution of life. Since many dMe stars emit large amount of UV radiation during flares, in this work we analyze the UV constrains for living systems on Earth-like planets around dM...
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We discuss the nature of the photoevaporating circumstellar disks in the Orion Nebula. The structure of thermally driven neutral and ionized ow from the disks is derived through a simple, spherical model. Evaporation ows are self-regulating, and from the estimated mass loss rates we show that it is possible to estimate the present disk masses. Two-dimensional eeects are discussed qualitatively ...
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With the aid of numerical experiments we examined the dynamical stability of fictitious terrestrial planets in 1:1 mean motion resonance with Jovian-like planets of extrasolar planetary systems. In our stability study of the so-called "Trojan" planets in the habitable zone, we used the restricted three-body problem with different mass ratios of the primary bodies. The application of the three-b...
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ژورنال
عنوان ژورنال: Icarus
سال: 2006
ISSN: 0019-1035
DOI: 10.1016/j.icarus.2006.03.007