One of the closest exoplanet pairs to the 3:2 Mean Motion Resonance: K2-19b \& c

Abstract

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 ~22000 objects over an 80 day timespan. We searched these data with the aim of detecting further important new objects. Our search through two separate pipelines led to the independent discovery of K2-19b \& c, a two-planet system of Neptune sized objects (4.2 and 7.2 $R_{\oplus }$), orbiting a K dwarf extremely close to the 3:2 mean motion resonance. The two planets each show transits, sometimes simultaneously due to their proximity to resonance and alignment of conjunctions. We obtain further ground based photometry of the larger planet with the NITES telescope, demonstrating the presence of large transit timing variations (TTVs), and use 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 validate the planets through the \texttt{PASTIS} tool, independently of the TTV analysis.

18 pages, 10 figures, accepted to A&A, updated to match published version

References in corpus (30)

• The Dartmouth Stellar Evolution Database
• The K2 Mission: Characterization and Early results
• DHP Framework: Digital Health Passports Using Blockchain -- Use case on international tourism during the COVID-19 pandemic
• A Technique for Extracting Highly Precise Photometry for the Two-Wheeled Kepler Mission
• Homogeneous studies of transiting extrasolar planets. I. Light curve analyses
• Modeling Kepler transit light curves as false positives: Rejection of blend scenarios for Kepler-9, and validation of Kepler-9d, a super-Earth-size planet in a multiple system
• The Exoplanet Orbit Database II: Updates to exoplanets.org
• PASTIS: Bayesian extrasolar planet validation. I. General framework, models, and performance
• A nearby M star with three transiting super-Earths discovered by K2
• Influence of Stellar Multiplicity On Planet Formation. II. Planets Are Less Common in Multiple-Star Systems with Separations Smaller than 1500 AU
• Stability Limits in Extra-solar Planetary Systems
• High-resolution imaging of $Kepler$ planet host candidates. A comprehensive comparison of different techniques
• Measurement of planet masses with transit timing variations due to synodic "chopping" effects
• Mean motion resonances from planet-planet scattering
• Characterizing K2 Planet Discoveries: A super-Earth transiting the bright K-dwarf HIP 116454
• SOPHIE velocimetry of Kepler transit candidates XII. KOI-1257 b: a highly eccentric three-month period transiting exoplanet
• K2 Variable Catalogue: Variable Stars and Eclipsing Binaries in K2 Campaigns 1 and 0
• spotrod: a semi-analytic model for transits of spotted stars
• Outward migration of Jupiter and Saturn in 3:2 or 2:1 resonance in radiative disks: implications for the Grand Tack and Nice models
• Tidal dissipation and the formation of Kepler near-resonant planets
• High-resolution Multi-band Imaging for Validation and Characterization of Small Kepler Planets
• The Effect of Conjunctions on the Transit Timing Variations of Exoplanets
• Traditional formation scenarios fail to explain 4:3 mean motion resonances
• Long term stability and dynamical environment of the PSR 1257+12 planetary system
• Near 3:2 and 2:1 mean motion resonances formation in the systems observed by Kepler
• Resonance breaking due to dissipation in planar planetary systems
• Formation and evolution of the two 4/3 resonant giants planets in HD 200946
• Prospects for detecting decreasing exoplanet frequency with main sequence age using PLATO
• Photo-Dynamical Analysis of Three Kepler Objects of Interest with Significant Transit Timing Variations
• Resonances of Multiple Exoplanets and Implications for Their Formation

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• It takes two planets in resonance to tango around K2-146
• The K2-ESPRINT Project VI: K2-105 b, a Hot-Neptune around a Metal-rich G-dwarf
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• Mass determination of K2-19b and K2-19c from radial velocities and transit timing variations
• Apsidal Alignment and Anti-Alignment of Planets in Mean-Motion Resonance: Disk-Driven Migration and Eccentricity Driving
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