A fuzzy Multi-Criteria Decision Making approach for Exo-Planetary Habitability

Nowadays, we know thousands of exoplanets, some them potentially habitable. Next technological facilities (JWST, for example) have exoplanet atmosphere analysis capabilities, but they also limits in terms how many targets can be studied. Therefore, there is a need to rank and prioritize these exoplanets with the aim searching biomarkers. Some criteria involved, such as habitability potential dry-rock planet versus water-rich planet, or potentially-locked tidally-locked are often vague use fuzzy set theory advisable. We applied combination Multi-Criteria Decision-Making methodologies logic, Fuzzy Reference Ideal Method (FRIM), this problem. analyzed 1798 from TEPCat database based on (composition, atmosphere, energy, tidal locking, type liquid water), their similarity only ideal alternative, The Earth. Our results, when compared probability index SEPHI, indicate that Kepler-442b, Kepler-062e/f, LHS_1140b best biomarkers, regardless its technical difficulty. If take into account current feasibility, candidate TRAPPIST-1e.