Limits on the Orbits and Masses of Moons around Currently-Known Transiting Exoplanets

Abstract

Aims. Current and upcoming space missions may be able to detect moons of transiting extra-solar planets. In this context it is important to understand if exomoons are expected to exist and what their possible properties are. Methods. Using estimates for the stability of exomoon orbits from numerical studies, a list of 87 known transiting exoplanets is tested for the potential to host large exomoons. Results. For 92% of the sample, moons larger than Luna can be excluded on prograde orbits, unless the parent exoplanet's internal structure is very different from the gas-giants of the solar system. Only WASP-24b, OGLE2-TR-L9, CoRoT-3b and CoRoT-9b could have moons above 0.4 m\oplus, which is within the likely detection capabilities of current observational facilities. Additionally, the range of possible orbital radii of exomoons of the known transiting exoplanets, with two exceptions, is below 8 Jupiter-radii and therefore rather small.

8 pages, 4 figures, accepted for publication by A&A

References in corpus (14)

• The Effect of a Strong Stellar Flare on the Atmospheric Chemistry of an Earth-like Planet Orbiting an M dwarf
• A Re-appraisal of the Habitability of Planets Around M Dwarf Stars
• Homogeneous studies of transiting extrasolar planets. III. Additional planets and stellar models
• Transit timing effects due to an exomoon
• Spectral signatures of photosynthesis II: coevolution with other stars and the atmosphere on extrasolar worlds
• Transiting exoplanets from the CoRoT space mission VI. CoRoT-Exo-3b: The first secure inhabitant of the brown-dwarf desert
• Transiting exoplanets from the CoRoT space mission I - CoRoT-Exo-1b: a low-density short-period planet around a G0V star
• Transiting extrasolar planetary candidates in the Galactic bulge
• WASP-4b: a 12th-magnitude transiting hot-Jupiter in the Southern hemisphere
• Determination of the size, mass, and density of "exomoons" from photometric transit timing variations
• OGLE2-TR-L9: An extrasolar planet transiting a fast-rotating F3 star
• The fate of moons of close-in giant exoplanets
• Habitability of exoplanetary systems with planets observed in transit
• New Parameters and Transit Timing Studies for OGLE2-TR-L9 b

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• Detecting ring systems around exoplanets using high resolution spectroscopy: the case of 51Pegb
• The detectability of habitable exomoons with Kepler
• Dynamical Effects on the Habitable Zone for Earth-like Exomoons
• The TROY project: Searching for co-orbital bodies to known planets. I. Project goals and first results from archival radial velocity
• The Solar Neighborhood XXIX: The Habitable Real Estate of our Nearest Stellar Neighbors
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• On the ultraviolet anomalies of the WASP-12 and HD 189733 systems: Trojan satellites as a plasma source
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• Worlds Without Moons: Exomoon Constraints for Compact Planetary Systems
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• Pandora: A fast open-source exomoon transit detection algorithm
• The Stability of Tidal Equilibrium for Hierarchical Star-Planet-Moon Systems
• Astrophysical Simulations and Data Analyses on the Formation, Detection, and Habitability of Moons Around Extrasolar Planets
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