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Título : Circumbinary habitability niches
Autor : Mason, Paul A.
Zuluaga Callejas, Jorge Iván
Cuartas Restrepo, Pablo Andrés
Clark, Joni M.
Palabras clave : Planeta circumbinario
Interacciones planetarias
Fecha de publicación : 2014
Editorial : Cambridge University Press
Citación : Mason, P. A., Zuluaga Callejas, J. I., Cuartas Restrepo, P. A., & Clark, J. M. (2014). Circumbinary habitability niches. International Journal of Astrobiology. 14, 1-10. doi:10.1017/S1473550414000342
Abstract : Binaries could provide the best niches for life in the Galaxy. Although counterintuitive, this assertion follows directly from stellar tidal interaction theory and the evolution of lower mass stars. There is strong evidence that chromospheric activity of rapidly rotating young stars may be high enough to cause mass loss from atmospheres of potentially habitable planets. The removal of atmospheric water is most critical. Tidal breaking in binaries could help reduce magnetic dynamo action and thereby chromospheric activity in favour of life. We call this the Binary Habitability Mechanism (BHM) that we suggest allows for water retention at levels comparable to or better than the Earth. We discuss novel advantages that life may exploit, in these cases, and suggest that life may even thrive on some circumbinary planets. We find that while many binaries do not benefit from BHM, high-quality niches do exist for various combinations of stars between 0.55 and 1.0 solar masses. For a given pair of stellar masses, BHM operates only for certain combinations of period and eccentricity. Binaries having a solar-type primary seem to be quite well-suited niches having wide and distant habitable zones with plentiful water and sufficient light for photosynthetic life. We speculate that, as a direct result of BHM, conditions may be suitable for life on several planets and possibly even moons of giant planets orbiting some binaries. Lower mass combinations, while more restrictive in parameter space, provide niches lasting many billions of years and are rich suppliers of photosynthetic photons.
Grupo de INV. : Grupo de Fisica y Astrofisica Computacional (FACOM)
ISSN : 1473-5504
1475-3006 E
Aparece en las colecciones: CIEN (Centro de Investigaciones en Ciencias Exactas y Naturales)

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