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Giant Planets that can Potentially Host Habitable Moons

27 Apr 2016, 22:00 UTC
Giant Planets that can Potentially Host Habitable Moons
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Díaz et al. (2016) present the detection of 4 gas giant planets in long-period orbits around stars that are somewhat more luminous than the Sun. The 4 planets were detected using the radial velocity method, and they are identified as HD191806b, HD214823b, HD221585b and HD16175b. The suffix "b" denotes their planetary nature. All 4 planets have orbits that are largely within the habitable zone of their host stars. Furthermore, because all 4 planets are much more massive than Jupiter, they can host correspondingly more massive moons that might be habitable.Figure 1: Artist's impression of a gas giant planet with a large habitable moon.HD191806b is estimated to have at least 8.52 ± 0.63 times the mass of Jupiter. It orbits its host star every 1606.3 ± 7.2 days with an orbital eccentricity estimated to be 0.259 ± 0.017. Its host star has 1.14 ± 0.12 times the mass and 2.23 ± 0.16 times the luminosity of the Sun, and its effective temperature is 6010 ± 30 K. The average amount of insolation HD191806b receives is 0.30 ± 0.03 times of what Earth gets from the Sun. The relatively low average insolation that HD191806b receives places it on the cold side of ...

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