https://doi.org/10.1140/epjs/s11734-023-01039-5
Regular Article
The planetary system Kepler-27 revisited
1
COAST, Observatório Nacional, R. Gal. José Cristino 77, 20921-400, Rio de Janeiro, RJ, Brazil
2
Instituto de Astronomía y Física del Espacio, UBA-CONICET, Ciudad Universitaria, Ciudad Autónoma de Buenos Aires, Argentina
Received:
12
May
2023
Accepted:
9
November
2023
Published online:
7
December
2023
Transit timing variations of planets in Kepler-27 were already reported in some papers, but the entire characterisation of them is still an open subject. Our main motivation for this paper is to investigate the dynamical behaviour of all planets and candidates in the systems. By using a MultiNest Bayesian inference tool, coupled to an efficient symplectic N-body integrator, we analyse the available TTV data of the objects in the system. We ran different configurations of planetary systems to compare them. We corroborate that Kepler-27b and Kepler-27c have actually properties of super-puffs planets, i.e., extremely low density planets with masses 
and radii akin to those of giant planets (
). We provide a constraint to the mass of Kepler-27d of 
, which results in a density of 
. For the candidate planet KOI-841.04, we find four solutions for its location and mass, inhibiting a proper characterisation. We also studied the dynamical behaviour of planets Kepler-27b and Kepler-27c for a range of masses and periods of KOI-841.04 and the results show that the two planets do not notice any perturbation in these configurations. This indicates that the recent classification of this object as a false positive it is in fact correct.
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© The Author(s), under exclusive licence to EDP Sciences, Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
