期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 513, 期 4, 页码 5290-5298出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stac1180
关键词
astrobiology; methods: numerical; planetary systems
资金
- Hungarian National Research, Development, and Innovation Office (NKFIH) [K-131508]
- European Union [847675]
- Marie Curie Actions (MSCA) [847675] Funding Source: Marie Curie Actions (MSCA)
This study investigates the habitability of hypothetical moons orbiting known exoplanets. It calculates the incident stellar radiation and tidal heating flux to determine habitability. Based on the results, a target list of exoplanets with a high probability of hosting habitable moons is provided.
We investigate the habitability of hypothetical moons orbiting known exoplanets. This study focuses on big, rocky exomoons that are capable of maintaining a significant atmosphere. To determine their habitability, we calculate the incident stellar radiation and the tidal heating flux arising in the moons as the two main contributors to the energy budget. We use the runaway greenhouse and the maximum greenhouse flux limits as a definition of habitability. For each exoplanet, we run our calculations for plausible ranges of physical and orbital parameters for the moons and the planet using a Monte Carlo approach. We calculate the moon habitability probability for each planet, which is the fraction of the investigated cases that lead to habitable conditions. Based on our results, we provide a target list for observations of known exoplanets of which the top 10 planets have more than 50 per cent chance for hosting habitable moons on stable orbits. Two especially promising candidates are Kepler-62 f and Kepler-16 b, both of them with known masses and radii. Our target list can help to detect the first habitable exomoon.
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