Characterizing the Cool KOIs. VII. Refined Physical Properties of the Transiting Brown Dwarf LHS 6343 C

Abstract

We present an updated analysis of LHS 6343, a triple system in the Kepler field which consists of a brown dwarf transiting one member of a widely-separated M+M binary system. By analyzing the full Kepler dataset and 34 Keck/HIRES radial velocity observations, we measure both the observed transit depth and Doppler semiamplitude to 0.5% precision. With Robo-AO and Palomar/PHARO adaptive optics imaging as well as TripleSpec spectroscopy, we measure a model-dependent mass for LHS 6343 C of 62.1 +/- 1.2 M_Jup and a radius of 0.783 +/- 0.011 R_Jup. We detect the secondary eclipse in the Kepler data at 3.5 sigma, measuring e cos omega = 0.0228 +/- 0.0008. We also derive a method to measure the mass and radius of a star and transiting companion directly, without any reliance on stellar models. The mass and radius of both objects depend only on the orbital period, stellar density, reduced semimajor axis, Doppler semiamplitude, eccentricity, and inclination, as well as the knowledge that the primary star falls on the main sequence. With this method, we calculate a model-independent mass and radius for LHS 6343 C to a precision of 3% and 2%, respectively.

arXiv comment13 pages, 8 figures, ApJ accepted

References in corpus (53)

• emcee: The MCMC Hammer
• The Sloan Digital Sky Survey: Technical Summary
• Analytic Lightcurves for Planetary Transit Searches
• The Dartmouth Stellar Evolution Database
• Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 20945
• Theoretical isochrones in several photometric systems I. Johnson-Cousins-Glass, HST/WFPC2, HST/NICMOS, Washington, and ESO Imaging Survey filter sets
• On the Unique Solution of Planet and Star Parameters from an Extrasolar Planet Transit Light Curve
• The Theory of Brown Dwarfs and Extrasolar Giant Planets
• The Infrared Telescope Facility (IRTF) Spectral Library: Cool Stars
• The Evolution of L and T Dwarfs in Color-Magnitude Diagrams
• Overview of the Kepler Science Processing Pipeline
• An Infrared Spectroscopic Sequence of M, L and T Dwarfs
• Stellar Diameters and Temperatures II. Main Sequence K & M Stars
• Homogeneous studies of transiting extrasolar planets. IV. Thirty systems with space-based light curves
• Kepler Asteroseismology Program: Introduction and First Results
• The California Planet Survey I. Four New Giant Exoplanets
• Metallicity and Temperature Indicators in M dwarf K band Spectra: Testing New & Updated Calibrations With Observations of 133 Solar Neighborhood M dwarfs
• Friends of Hot Jupiters I: A Radial Velocity Search for Massive, Long-Period Companions to Close-In Gas Giant Planets
• Stellar Spin-Orbit Misalignment in a Multiplanet System
• KELT-1b: A Strongly Irradiated, Highly Inflated, Short Period, 27 Jupiter-mass Companion Transiting a mid-F Star
• Transiting exoplanets from the CoRoT space mission VI. CoRoT-Exo-3b: The first secure inhabitant of the brown-dwarf desert
• Periodic Flux Variability of Stars due to the Reflex Doppler Effect Induced by Planetary Companions
• Dynamical Mass of the Substellar Benchmark Binary HD 130948BC
• The Discovery of Ellipsoidal Variations in the Kepler Light Curve of HAT-P-7
• The Dependence of Brown Dwarf Radii on Atmospheric Metallicity and Clouds: Theory and Comparison with Observations
• The Photoeccentric Effect and Proto-Hot Jupiters I. Measuring photometric eccentricities of individual transiting planets
• Robotic Laser-Adaptive-Optics Imaging of 715 Kepler Exoplanet Candidates using Robo-AO
• An observational correlation between stellar brightness variations and surface gravity
• The EBLM Project I-Physical and orbital parameters, including spin-orbit angles, of two low-mass eclipsing binaries on opposite sides of the Brown Dwarf limit
• Crossing the Brown Dwarf Desert Using Adaptive Optics: A Very Close L-Dwarf Companion to the Nearby Solar Analog HR 7672
• Transiting exoplanets from the CoRoT space mission. XV. CoRoT-15b: a brown dwarf transiting companion
• The Dynamical Mass and Three-Dimensional Orbit of HR7672B: A Benchmark Brown Dwarf with High Eccentricity
• LHS6343C: A Transiting Field Brown Dwarf Discovered by the Kepler Mission
• High-efficiency Autonomous Laser Adaptive Optics
• The Age, Stellar Content and Star Formation Timescale of the B59 Dense Core
• SOPHIE velocimetry of Kepler transit candidates III. KOI-423b: an 18 Mjup transiting companion around an F7IV star
• SOPHIE velocimetry of Kepler transit candidates IX. KOI-415 b: a long-period, eccentric transiting brown dwarf to an evolved Sun
• NLTT 41135: a field M-dwarf + brown dwarf eclipsing binary in a triple system, discovered by the MEarth observatory
• New Evidence for a Substellar Luminosity Problem: Dynamical Mass for the Brown Dwarf Binary Gl 417BC
• Discovery of Five Very Low Mass Close Binaries, Resolved in the Visible with Lucky Imaging
• Signatures of Cloud, Temperature, and Gravity From Spectra of the Closest Brown Dwarfs
• SOPHIE velocimetry of Kepler transit candidates. VIII. KOI-205 b: a brown-dwarf companion to a K-type dwarf
• Characterizing the Cool KOIs. VI. H- and K-band Spectra of Kepler M Dwarf Planet-Candidate Hosts
• The substellar companion in the eclipsing white dwarf binary SDSS J141126.20+200911.1
• Fourteen New Companions from the Keck & Lick Radial Velocity Survey Including Five Brown Dwarf Candidates
• A Monitoring Campaign for Luhman 16AB. I. Detection of Resolved Near-Infrared Spectroscopic Variability
• SOPHIE velocimetry of Kepler transit candidates. XIII. KOI-189 B and KOI-686 B: two very low-mass stars in long-period orbits
• The EVIL-MC Model for Ellipsoidal Variations of Planet-Hosting Stars and Applications to the HAT-P-7 System
• A massive exoplanet candidate around KOI-13: Independent confirmation by ellipsoidal variations
• Using High-Resolution Optical Spectra to Measure Intrinsic Properties of Low-Mass Stars: New Properties for KOI-314 and GJ 3470
• Photospheric activity, rotation and magnetic interaction in LHS 6343 A
• Transit-timing measurements with the model-independent barycenter method: Application to the LHS 6343 system
• Doppler-beaming in the Kepler light curve of LHS 6343 A

Cited by in corpus (19)

• Probabilistic Forecasting of the Masses and Radii of Other Worlds
• Stellar and Planetary Properties of K2 Campaign 1 Candidates and Validation of 17 Planets, Including a Planet Receiving Earth-like Insolation
• Eleven Multi-planet Systems from K2 Campaigns 1 & 2 and the Masses of Two Hot Super-Earths
• A Lucky Imaging search for stellar sources near 74 transit hosts
• Robo-AO Kepler Planetary Candidate Survey II: Adaptive Optics Imaging of 969 Kepler Exoplanet Candidate Host Stars
• EPIC201702477b: A Long Period Transiting Brown Dwarf from K2
• Dynamical Masses of Young M Dwarfs: Masses and Orbital Parameters of GJ 3305 AB, the Wide Binary Companion to the Imaged Exoplanet Host 51 Eri
• The TRENDS High-Contrast Imaging Survey. VI. Discovery of a Mass, Age, and Metallicity Benchmark Brown Dwarf
• The Five Planets in the Kepler-296 Binary System All Orbit the Primary: A Statistical and Analytical Analysis
• H-alpha and Ca II Infrared Triplet Variations During a Transit of the 23 Myr Planet V1298 Tau c
• TOI-1278 B: SPIRou unveils a rare Brown Dwarf Companion in Close-In Orbit around an M dwarf
• Uniform Forward-Modeling Analysis of Ultracool Dwarfs. II. Atmospheric Properties of 55 Late-T Dwarfs
• An M dwarf accompanied by a close-in giant orbiter with SPECULOOS
• Individual, Model-Independent Masses of the Closest Known Brown Dwarf Binary to the Sun
• Kepler-447b: a hot-Jupiter with an extremely grazing transit
• Measuring the Number of M-Dwarfs per M-Dwarf Using Kepler Eclipsing Binaries
• TOI 694 b and TIC 220568520 b: Two Low-Mass Companions Near the Hydrogen Burning Mass Limit Orbiting Sun-like Stars
• An eclipsing M-dwarf close to the hydrogen burning limit from NGTS
• Benchmark Transiting Brown Dwarf LHS 6343 C: Spitzer Secondary Eclipse Observations Yield Brightness Temperature and mid-T Spectral Class