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One of the closest exoplanet pairs to the 3:2 mean motion resonance : K2-19b and c
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(2015) One of the closest exoplanet pairs to the 3:2 mean motion resonance : K2-19b and c. Astronomy & Astrophysics, 582 . A33. doi:10.1051/0004-6361/201526008 ISSN 0004-6361.
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Official URL: http://dx.doi.org/10.1051/0004-6361/201526008
Abstract
Aims. The K2 mission has recently begun to discover new and diverse planetary systems. In December 2014, Campaign 1 data from the mission was released, providing high-precision photometry for ∼22 000 objects over an 80-day timespan. We searched these data with the aim of detecting more important new objects. Methods. Our search through two separate pipelines led to the independent discovery of K2-19b and c, a two-planet system of Neptune-sized objects (4.2 and 7.2 R⊕), orbiting a K dwarf extremely close to the 3:2 mean motion resonance. The two planets each show transits, sometimes simultaneously owing to their proximity to resonance and the alignment of conjunctions. Results. We obtained further ground-based photometry of the larger planet with the NITES telescope, demonstrating the presence of large transit timing variations (TTVs), and used the observed TTVs to place mass constraints on the transiting objects under the hypothesis that the objects are near but not in resonance. We then statistically validated the planets through the PASTIS tool, independently of the TTV analysis.
Item Type: | Journal Article | ||||||||
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Subjects: | Q Science > QB Astronomy | ||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
Library of Congress Subject Headings (LCSH): | Satellites | ||||||||
Journal or Publication Title: | Astronomy & Astrophysics | ||||||||
Publisher: | EDP Sciences | ||||||||
ISSN: | 0004-6361 | ||||||||
Official Date: | 1 October 2015 | ||||||||
Dates: |
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Volume: | 582 | ||||||||
Article Number: | A33 | ||||||||
DOI: | 10.1051/0004-6361/201526008 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 15 April 2016 | ||||||||
Date of first compliant Open Access: | 15 April 2016 | ||||||||
Funder: | United States. National Aeronautics and Space Administration (NASA), European Research Council (ERC), Seventh Framework Programme (European Commission) (FP7) | ||||||||
Grant number: | NAS5-26555 (NASA), NNX13AC07G (NASA), 627202 (ERC), 320964 (ERC) | ||||||||
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