Homogeneous studies of transiting extrasolar planets. I. Light curve analyses

Abstract

I present an homogeneous analysis of the transit light curves of 14 well-observed transiting extrasolar planets. The light curves are modelled using JKTEBOP, random errors are measured using Monte Carlo simulations, and the effects of correlated noise are included using a residual-permutation algorithm. The importance of stellar limb darkening (LD) on the light curve solutions and parameter uncertainties is investigated using five different LD laws. The linear LD law cannot adequately fit the HST photometry of HD 209458, but the other four laws give very similar results to each other. In most cases fixing the LD coefficients at theoretical values does not bias the results, but DOES cause the error estimates to be too small. The available theoretical LD coefficients clearly disagree with empirical values measured from the HST light curves of HD 209458; LD must be included as fitted parameters when analysing high-quality light curves. In most cases the results of my analysis agree with the values found by other authors, but the uncertainties I find are up to 3 times larger. Despite this, the analyses of sets of independent light curves for both HD 189733 and HD 209458 do not agree with each other. This discrepancy is worst for the ratio of the radii (6.7 and 3.7 sigma), which depends primarily on the depth of the transit. It is therefore not due to the analysis method but is present in the light curves. These underlying systematic errors cannot be detected from the reduced data alone. Using my results and the stellar spectroscopic orbits, I confirm the correlation between the surface gravities of transiting extrasolar planets and their orbital periods. [abridged]

Accepted for publication in MNRAS. 25 pages with many tables and figures, plus an appendix (14 pages, all tables). The JKTEBOP and JKTLD codes are available from http://www.astro.keele.ac.uk/~jkt/

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• Transmission spectroscopy of the hot Jupiter TrES-3 b: Disproof of an overly large Rayleigh-like feature
• Transiting Exoplanet Monitoring Project (TEMP). III. On the Relocation of the Kepler-9~b Transit
• The ultra-hot-Jupiter KELT-16 b: Dynamical Evolution and Atmospheric Properties
• Photometric Investigation of Hot Exoplanets: TrES-3b and Qatar-1b
• Ground-based detection of the near-infrared emission from the dayside of WASP-5b
• Twenty-One New Light Curves of OGLE-TR-56b: New System Parameters and Limits on Timing Variations
• RoadRunner: a fast and flexible exoplanet transit model
• Photometric Follow-up Transit (Primary Eclipse) Observations of WASP-43 b and TrES-3b and A Study on Their Transit Timing Variations
• Orbital and physical parameters of eclipsing binaries from the All-Sky Automated Survey catalogue - VI. AK Fornacis - a rare, bright K-type eclipsing binary
• Trends in Spitzer Secondary Eclipses
• Mass determination of K2-19b and K2-19c from radial velocities and transit timing variations
• TESS Observations of the Hot Jupiter Exoplanet XO-6b: No Evidence of Transit Timing Variations
• V456 Cyg: An eclipsing binary with tidally perturbed g-mode pulsations
• Warm Spitzer Occultation Photometry of WASP-26b at 3.6μm and 4.5μm
• Photometric defocus observations of transiting extrasolar planets
• Pre-discovery transits of the exoplanets WASP-18 b and WASP-33 b from Hipparcos
• A search for transit timing variations in the HATS-18 planetary system
• Simulations of starspot anomalies within TESS exoplanetary transit light curves -- I. The detection limits of starspot anomalies in TESS light curves
• Measuring accurate transit parameters
• New approach for modeling of transiting exoplanets for arbitrary limb-darkening law
• Multi-band characterization of the hot Jupiters: WASP-5b, WASP-44b and WASP-46b
• Establishing the accuracy of asteroseismic mass and radius estimates of giant stars. II. Revised stellar masses and radii for KIC 8430105
• Revising the properties of low mass eclipsing binary stars using TESS light curves
• Detection capability of ground-based meter-sized telescopes for shallow exoplanet transits
• HSTEP -- Homogeneous Studies of Transiting Extrasolar Planets
• Orbital and physical parameters of eclipsing binaries from the All-Sky Automated Survey catalogue - VII. V1200 Centauri: a bright triple in the Hyades moving group
• $\delta$ Scuti pulsations in the bright Pleiades eclipsing binary HD 23642
• WASP-12b: A Mass-Losing Extremely Hot Jupiter
• Revisiting the Full Sets of Orbital Parameters for the XO-3 System: No evidence for Temporal Variation of the Spin-Orbit Angle
• Physical properties and optical-infrared transmission spectrum of the giant planet XO-1b
• The nature of the eccentric doubled-lined eclipsing binary system KIC 2306740 with Kepler space photometry
• AutoRegressive Planet Search: Feasibility Study for Irregular Time Series
• Absolute dimensions of the F-type eclipsing binary V2154 Cygni
• Using Stellar Spectral Energy Distributions to Measure Exoplanet Parameters
• No further evidence for a transiting inner companion to the hot Jupiter HATS-50b
• A search for transit timing variations in the transiting hot Jupiter systems HIP 65, NGTS-6, NGTS-10 and WASP-173
• The Multiband Imaging Survey for High-Alpha PlanetS (MISHAPS) I: Preliminary Constraints on the Occurrence Rate of Hot Jupiters in 47 Tucanae
• Transit modelling of selected Kepler systems