Discovery and Characterization of Kepler-36b

Abstract

We describe the circumstances that led to the discovery of Kepler-36b, and the subsequent characterization of its host planetary system. The Kepler-36 system is remarkable for its physical properties: the close separation of the planets, the contrasting densities of the planets despite their proximity, and the short chaotic timescale. Its discovery and characterization was also remarkable for the novelty of the detection technique and for the precise characterization due to the large transit-timing variations caused by the close proximity of the planets, as well as the precise stellar parameters due to asteroseismology. This was the first multi-planet system whose transit data was processed using a fully consistent photometric-dynamical model, using population Markov Chain Monte Carlo techniques to precisely constrain system parameters. Amongst those parameters, the stellar density was found to be consistent with a complementary, concurrent asteroseismic analysis. In a first, the 3D orientation of the planets was constrained from the lack of transit-duration variations. The system yielded insights into the composition and evolution of short-period planet systems. The denser planet appears to have an Earth-like composition, with uncertainties comparable to the highest precision rocky exoplanet measurements, and the planet densities foreshadowed the rocky/gaseous boundary. The formation of this system remains a mystery, but should yield insights into the migration and evolution of compact exoplanet systems.

arXiv comment31 pages, 9 figures. In press with New Astronomy Reviews special issue on key discoveries with Kepler

References in corpus (38)

• Analytic Lightcurves for Planetary Transit Searches
• The California-Kepler Survey. III. A Gap in the Radius Distribution of Small Planets
• Planetary Candidates Observed by Kepler, III: Analysis of the First 16 Months of Data
• Characteristics of planetary candidates observed by Kepler, II: Analysis of the first four months of data
• A box-fitting algorithm in the search for periodic transits
• On the Unique Solution of Planet and Star Parameters from an Extrasolar Planet Transit Light Curve
• DHP Framework: Digital Health Passports Using Blockchain -- Use case on international tourism during the COVID-19 pandemic
• On detecting terrestrial planets with timing of giant planet transits
• Most 1.6 Earth-Radius Planets are not Rocky
• The evaporation valley in the Kepler planets
• Kepler-16: A Transiting Circumbinary Planet
• The Mass-Radius Relation for 65 Exoplanets Smaller than 4 Earth Radii
• Dynamical Origin of Extrasolar Planet Eccentricity Distribution
• Validation of Kepler's Multiple Planet Candidates. III: Light Curve Analysis & Announcement of Hundreds of New Multi-planet Systems
• The Role of Core Mass in Controlling Evaporation: the Kepler Radius Distribution and the Kepler-36 Density Dichotomy
• Kepler-36: A Pair of Planets with Neighboring Orbits and Dissimilar Densities
• Identifying Exoplanets with Deep Learning: A Five Planet Resonant Chain around Kepler-80 and an Eighth Planet around Kepler-90
• Prospects for the Characterization and Confirmation of Transiting Exoplanets via the Rossiter-McLaughlin Effect
• Orbital perturbations on transiting planets: A possible method to measure stellar quadrupoles and to detect Earth-mass planets
• Validation of Kepler's Multiple Planet Candidates. II: Refined Statistical Framework and Descriptions of Systems of Special Interest
• Planetary Candidates Observed by Kepler IV: Planet Sample From Q1-Q8 (22 Months)
• The Planetary System to KIC 11442793: A Compact Analogue to the Solar System
• Transit Timing Observations from Kepler: I. Statistical Analysis of the First Four Months
• Migration-driven diversity of super-Earth compositions
• Two massive rocky planets transiting a K-dwarf 6.5 parsecs away
• Planet Hunters VII. Discovery of a New Low-Mass, Low-Density Planet (PH3 c) Orbiting Kepler-289 with Mass Measurements of Two Additional Planets (PH3 b and d)
• Rapid dynamical chaos in an exoplanetary system
• The Quasiperiodic Automated Transit Search Algorithm
• Planet Hunters. VI: An Independent Characterization of KOI-351 and Several Long Period Planet Candidates from the Kepler Archival Data
• The formation of systems with closely spaced low-mass planets and the application to Kepler-36
• Transit Light Curves with Finite Integration Time: Fisher Information Analysis
• Traditional formation scenarios fail to explain 4:3 mean motion resonances
• Origin Scenarios for the Kepler 36 Planetary System
• Origin of Chaos in the Prometheus-Pandora System
• The initial physical conditions of Kepler-36 b & c
• An Algorithm For Photometric Identification Of Transiting Circumbinary Planets
• Potential Biases in the Detection of Planetary Systems with Large Transit Timing Variations
• Detection of transit timing variations in excess of one hour in the Kepler multi-planet candidate system KOI 806 with the GTC

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• Searching for Small Circumbinary Planets I. The STANLEY Automated Algorithm and No New Planets in Existing Systems
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