Exomoons in the habitable zones of M dwarfs

Abstract

M dwarfs host most of the exoplanets in the local Milky Way. Some of these planets, ranging from sub-Earths to super-Jupiters, orbit in their stars' habitable zones (HZs), although many likely possess surface environments that preclude habitability. Moreover, exomoons around these planets could harbor life for long timescales and thus may also be targets for biosignature surveys. Here we investigate the potential habitability, stability, and detectability of exomoons around exoplanets orbiting M dwarfs. We first compile an updated list of known M-dwarf exoplanet hosts, comprising 109 stars and 205 planets. For each M dwarf, we compute and update precise luminosities with the Virtual Observatory spectral energy distribution Analyzer and Gaia DR2 parallaxes to determine inner and outer boundaries of their HZs. For each planet, we retrieve (or, when necessary, homogeneously estimate) their masses and radii, calculate the long-term dynamical stability of hypothetical moons, and identify those planets that can support habitable moons. We find that 33 exoplanet candidates are located in the HZs of their host stars and that four of them could host Moon- to Titan-mass exomoons for timescales longer than the Hubble time.

28 pages, 5 figures, 6 tables

References in corpus (68)

• The NumPy array: a structure for efficient numerical computation
• The Gaia mission
• Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1
• New evolutionary models for pre-main sequence and main sequence low-mass stars down to the hydrogen-burning limit
• A terrestrial planet candidate in a temperate orbit around Proxima Centauri
• Mass-Radius Relationships for Solid Exoplanets
• Most 1.6 Earth-Radius Planets are not Rocky
• Habitable Zones Around Main-Sequence Stars: Dependence on Planetary Mass
• VOSA: Virtual Observatory SED Analyzer. An application to the Collinder 69 open cluster
• Habitable planets around the star Gl 581?
• The Solar Neighborhood XVII: Parallax Results from the CTIOPI 0.9m Program -- Twenty New Members of the RECONS 10 Parsec Sample
• Accurate, Empirical Radii and Masses of Planets and their Host Stars with Gaia Parallaxes
• Tidal Evolution of Close-in Extra-Solar Planets
• A Re-appraisal of the Habitability of Planets Around M Dwarf Stars
• A New Planet Around an M Dwarf: Revealing a Correlation Between Exoplanets and Stellar Mass
• The HARPS search for southern extra-solar planets XI. Super-Earths (5 & 8 M_Earth) in a 3-planet system
• An Earth-sized Planet in the Habitable Zone of a Cool Star
• Transit timing effects due to an exomoon
• The HARPS search for southern extra-solar planets. X. A m sin i = 11 Mearth planet around the nearby spotted M dwarf GJ 674
• The habitability of Proxima Centauri b II. Possible climates and Observability
• The Atmospheric Signatures of Super-Earths: How to Distinguish Between Hydrogen-Rich and Hydrogen-Poor Atmospheres
• Hubble Space Telescope times-series photometry of the planetary transit of HD189733: no moon, no rings, starspots
• The Solar Neighborhood XXXVII: The Mass-Luminosity Relation for Main Sequence M Dwarfs
• Tidal Locking of Habitable Exoplanets
• A generalized bayesian inference method for constraining the interiors of super Earths and sub-Neptunes
• The CARMENES search for exoplanets around M dwarfs: Different roads to radii and masses of the target stars
• Tidal Heating of Extra-Solar Planets
• Bayesian search for low-mass planets around nearby M dwarfs. Estimates for occurrence rate based on global detectability statistics
• Habitat of early life: Solar X-ray and UV radiation at Earth's surface 4-3.5 billion years ago
• Tidal Heating of Terrestrial Extra-Solar Planets and Implications for their Habitability
• HATS-6b: A Warm Saturn Transiting an Early M Dwarf Star, and a Set of Empirical Relations for Characterizing K and M Dwarf Planet Hosts
• Validation of Twelve Small Kepler Transiting Planets in the Habitable Zone
• Formation, Habitability, and Detection of Extrasolar Moons
• SPIRou: the near-infrared spectropolarimeter/high-precision velocimeter for the Canada-France-Hawaii telescope
• Effects of Extreme Obliquity Variations on the Habitability of Exoplanets
• The mass of the Mars-sized exoplanet Kepler-138 b from transit timing
• M Dwarf Metallicities and Giant Planet Occurrence: Ironing Out Uncertainties and Systematics
• Tides and the Evolution of Planetary Habitability
• Detectability of atmospheric features of Earth-like planets in the habitable zone around M dwarfs
• HEK VI: On the Dearth of Galilean Analogs in Kepler and the Exomoon Candidate Kepler-1625b I
• Kepler-445, Kepler-446 and the Occurrence of Compact Multiples Orbiting Mid-M Dwarf Stars
• Two planets around Kapteyn's star : a cold and a temperate super-Earth orbiting the nearest halo red-dwarf
• Determination of the size, mass, and density of "exomoons" from photometric transit timing variations
• Characterization of the K2-18 multi-planetary system with HARPS: A habitable zone super-Earth and discovery of a second, warm super-Earth on a non-coplanar orbit
• A temperate exo-Earth around a quiet M dwarf at 3.4 parsecs
• GJ 832c: A super-earth in the habitable zone
• The HARPS search for southern extra-solar planets XXXV. Planetary systems and stellar activity of the M dwarfs GJ 3293, GJ 3341, and GJ 3543
• Water Trapping on Tidally Locked Terrestrial Planets Requires Special Conditions
• K2 Discovers a Busy Bee: An Unusual Transiting Neptune Found in the Beehive Cluster
• The Transiting System GJ1214: High-Precision Defocused Transit Observations and a Search for Evidence of Transit Timing Variation
• No Evidence for Lunar Transit in New Analysis of Hubble Space Telescope Observations of the Kepler-1625 System
• Warm Ice Giant GJ 3470b. II Revised Planetary and Stellar Parameters from Optical to Near-infrared Transit Photometry
• The HARPS search for southern extra-solar planets XLII. A system of Earth-mass planets around the nearby M dwarf YZ Ceti
• The CARMENES search for exoplanets around M dwarfs - HD 147379b: A nearby Neptune in the temperate zone of an early-M dwarf
• An alternative interpretation of the exomoon candidate signal in the combined Kepler and Hubble data of Kepler-1625
• The HADES RV Programme with HARPS-N@TNG - GJ 3998: An early M-dwarf hosting a system of Super-Earths
• Transit of Exomoon Plasma Tori: New Diagnosis
• The HADES RV Programme with HARPS-N@TNG. III. Flux-flux and activity-rotation relationships of early-M dwarfs
• Tidal dissipation in a homogeneous spherical body. II. Three examples: Mercury, Io, and Kepler-10 b
• Relative Likelihood for Life as a Function of Cosmic Time
• HADES RV Programme with HARPS-N at TNG: V. A super-Earth on the inner edge of the habitable zone of the nearby M-dwarf GJ 625
• Exomoon Habitability and Tidal Evolution in Low-Mass Star Systems
• The mass of planet GJ676A b from ground-based astrometry: A planetary system with two mature gas giants suitable for direct imaging
• HADES RV program with HARPS-N at TNG. IX. A super-Earth around the M dwarf Gl686
• The SOPHIE search for northern extrasolar planets XV. A Warm Neptune around the M-dwarf Gl378
• K2-288Bb: A Small Temperate Planet in a Low-mass Binary System Discovered by Citizen Scientists
• On The Feasibility of Exomoon Detection Via Exoplanet Phase Curve Spectral Contrast
• Three small transiting planets around the M dwarf host star LP 358-499

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• Density, not radius, separates rocky and water-rich small planets orbiting M dwarf stars
• The CARMENES search for exoplanets around M dwarfs -- Planet occurrence rates from a subsample of 71 stars
• ARIADNE: Measuring accurate and precise stellar parameters through SED fitting
• A detailed analysis of the Gl 486 planetary system
• An ultra-short-period transiting super-Earth orbiting the M3 dwarf TOI-1685
• Exomoon Candidates from Transit Timing Variations: Eight Kepler systems with TTVs explainable by photometrically unseen exomoons
• The CARMENES search for exoplanets around M dwarfs, Wolf 1069 b: Earth-mass planet in the habitable zone of a nearby, very low-mass star
• TOI-1468: A system of two transiting planets, a super-Earth and a mini-Neptune, on opposite sides of the radius valley
• Can close-in giant exoplanets preserve detectable moons?
• Two super-Earths at the edge of the habitable zone of the nearby M dwarf TOI-2095
• Impact of Tides on the Potential for Exoplanets to Host Exomoons
• Eta-Earth Revisited II: Deriving a Maximum Number of Earth-like Habitats in the Galactic Disk
• A target list for searching for habitable exomoons
• Cronomoons: origin, dynamics, and light-curve features of ringed exomoons
• The ominous fate of exomoons around hot Jupiters in the high-eccentricity migration scenario
• A multi-planetary system orbiting the early-M dwarf TOI-1238
• Photometric Calibrations of M-dwarf Metallicity with Markov Chain Monte Carlo and Bayesian Inference
• The GAPS programme at TNG LXIV: An inner eccentric sub-Neptune and an outer sub-Neptune-mass candidate around BD+00 444 (TOI-2443)
• Extreme exomoons in WASP-49 Ab: dynamics and detectability
• Astrometric exomoon detection by means of optical interferometry
• Around which stars can TESS detect Earth-like planets? The Revised TESS Habitable Zone Catalog
• The effect of post-Newtonian spin precessions on the evolution of exomoons' obliquity
• New models of reflection spectra for terrestrial exoplanets: Present and prebiotic Earth orbiting around stars of different spectral types
• The Most Common Habitable Planets III -- Modeling Temperature Forcing and Surface Conditions on Rocky Exoplanets and Exomoons
• Survival of exomoons around exoplanets