A terrestrial planet candidate in a temperate orbit around Proxima CentauriReport as inadecuate




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At a distance of 1.295 parsecs1, the red dwarf Proxima Centauri a Centauri C, GL 551, HIP 70890 or simply Proxima is the Sun-s closest stellar neighbour and one of the best-studied low-mass stars. It has an effective temperature of only around 3,050 kelvin, a luminosity of 0.15 per cent of that of the Sun, a measured radius of 14 per cent of the radius of the Sun2 and a mass of about 12 per cent of the mass of the Sun. Although Proxima is considered a moderately active star, its rotation period is about 83 days ref. 3 and its quiescent activity levels and X-ray luminosity4 are comparable to those of the Sun. Here we report observations that reveal the presence of a small planet with a minimum mass of about 1.3 Earth masses orbiting Proxima with a period of approximately 11.2 days at a semi-major-axis distance of around 0.05 astronomical units. Its equilibrium temperature is within the range where water could be liquid on its surface5.Indización

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Author: Anglada-Escude, Guillem; - Amado, Pedro J.; - Barnes, John; - Berdinas, Zaira M.; - Butler, R. Paul; - Coleman, Gavin A. L.; - Cu

Source: http://repositorio.uchile.cl/



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