Refined physical properties of the HAT-P-13 planetary system

Abstract

We present photometry of four transits of the planetary system HAT-P-13, obtained using defocussed telescopes. We analyse these, plus nine datasets from the literature, in order to determine the physical properties of the system. The mass and radius of the star are M_A = 1.320 +/- 0.048 +/- 0.039 Msun and R_A = 1.756 +/- 0.043 +/- 0.017 Rsun (statistical and systematic errorbars). We find the equivalent quantities for the transiting planet to be M_b = 0.906 +/- 0.024 +/- 0.018 Mjup and R_b = 1.487 +/- 0.038 +/- 0.015 Rjup, with an equilibrium temperature of 1725 +/- 31 K. Compared to previous results, which were based on much sparser photometric data, we find the star to be more massive and evolved, and the planet to be larger, hotter and more rarefied. The properties of the planet are not matched by standard models of irradiated gas giants. Its large radius anomaly is in line with the observation that the hottest planets are the most inflated, but at odds with the suggestion of inverse proportionality to the [Fe/H] of the parent star. We assemble all available times of transit midpoint and determine a new linear ephemeris. Previous findings of transit timing variations in the HAT-P-13 system are shown to disagree with these measurements, and can be attributed to small-number statistics.

Accepted for publication in MNRAS. 8 pages, 5 tables, 3 figures. The results have been included in the TEPCat catalogue of transiting planets at http://www.astro.keele.ac.uk/~jkt/tepcat/

References in corpus (22)

• Achieving better than 1 minute accuracy in the Heliocentric and Barycentric Julian Dates
• Homogeneous studies of transiting extrasolar planets. IV. Thirty systems with space-based light curves
• Homogeneous studies of transiting extrasolar planets. I. Light curve analyses
• WASP-3b: a strongly-irradiated transiting gas-giant planet
• On the Anomalous Radii of the Transiting Extrasolar Planets
• XO-2b: Transiting Hot Jupiter in a Metal-rich Common Proper Motion Binary
• Homogeneous studies of transiting extrasolar planets. II. Physical properties
• The Transit Light Curve Project. VII. The Not-So-Bloated Exoplanet HAT-P-1b
• A transit timing analysis of nine RISE light curves of the exoplanet system TrES-3
• Long-Term Transit Timing Monitoring and Refined Light Curve Parameters of HAT-P-13b
• WASP-10b: a 3M_J, gas-giant planet transiting a late-type K star
• WASP-35b, WASP-48b and WASP-51b: Two new planets and an independent discovery of HAT-P-30b
• The AGN and Gas Disk in the Low Surface Brightness Galaxy PGC045080
• Two Upper Limits on the Rossiter-McLaughlin Effect, with Differing Implications: WASP-1 has a High Obliquity and WASP-2 is Indeterminate
• Transit timing variation and activity in the WASP-10 planetary system
• Lack of Transit Timing Variations of OGLE-TR-111b: A re-analysis with six new epochs
• TASTE: The Asiago Search for Transit timing variations of Exoplanets. I. Overview and improved parameters for HAT-P-3b and HAT-P-14b
• HAT-P-13: a multi-site campaign to detect the transit of the second planet in the system
• An Analysis of Jitter and Transit Timing Variations in the HAT-P-13 System
• Detection of period variations in extrasolar transiting planet OGLE-TR-111b
• Transit timing variations in the HAT-P-13 planetary system
• TASTE. II. A new observational study of transit time variations in HAT-P-13b

Cited by in corpus (36)

• Probabilistic Forecasting of the Masses and Radii of Other Worlds
• Friends of Hot Jupiters I: A Radial Velocity Search for Massive, Long-Period Companions to Close-In Gas Giant Planets
• Homogeneous studies of transiting extrasolar planets. V. New results for 38 planets
• Friends of Hot Jupiters II: No Correspondence Between Hot-Jupiter Spin-Orbit Misalignment and the Incidence of Directly Imaged Stellar Companions
• A library of ATMO forward model transmission spectra for hot Jupiter exoplanets
• Ground-based near-UV observations of 15 transiting exoplanets: Constraints on their atmospheres and no evidence for asymmetrical transits
• TESS Transit Timing of Hundreds of Hot Jupiters
• Physical properties, transmission and emission spectra of the WASP-19 planetary system from multi-colour photometry
• Statistical Characterization of Hot Jupiter Atmospheres using Spitzer's Secondary Eclipses
• ExoClock Project III: 450 new exoplanet ephemerides from ground and space observations
• Bayesian mass and age estimates for transiting exoplanet host stars
• A lower radius and mass for the transiting extrasolar planet HAT-P-8b
• High-precision photometry by telescope defocussing. IV. Confirmation of the huge radius of WASP-17b
• Physical properties, starspot activity, orbital obliquity, and transmission spectrum of the Qatar-2 planetary system from multi-colour photometry
• Physical properties and radius variations in the HAT-P-5 planetary system from simultaneous four-colour photometry
• Multi-band, Multi-epoch Observations of the Transiting Warm Jupiter WASP-80b
• Multi-site campaign for transit timing variations of WASP-12 b: possible detection of a long-period signal of planetary origin
• ExoClock project II: A large-scale integrated study with 180 updated exoplanet ephemerides
• Dynamical Constraints on the Core Mass of Hot Jupiter HAT-P-13b
• The SOPHIE search for northern extrasolar planets IX. Populating the brown dwarf desert
• Kepler-77b: a very low albedo, Saturn-mass transiting planet around a metal-rich solar-like star
• Homogeneously derived transit timings for 17 exoplanets and reassessed TTV trends for WASP-12 and WASP-4
• Simultaneous follow-up of planetary transits: revised physical properties for the planetary systems HAT-P-16 and WASP-21
• No Transit Timing Variations in WASP-4
• TTVs analysis in Southern Stars: the case of WASP-28
• Physical properties of the WASP-44 planetary system from simultaneous multi-colour photometry
• Refined physical properties and g',r',i',z',J,H,K transmission spectrum of WASP-23b from the ground
• Spin-orbit alignments for Three Transiting Hot Jupiters: WASP-103b, WASP-87b, & WASP-66b
• Physical properties of the HAT-P-23 and WASP-48 planetary systems from multi-colour photometry
• Exoplanet Transits Registered at the Universidad de Monterrey Observatory. Part I: HAT-P-12b, HAT-P-13b, HAT-P-16b, HAT-P-23b and WASP-10b
• The Atmosphere and Interior Structure of HAT-P-13b from Spitzer Secondary Eclipses
• The GAPS Programme at TNG: XXXVI. Measurement of the Rossiter-McLaughlin effect and revising the physical and orbital parameters of the HAT-P-15, HAT-P-17, HAT-P-21, HAT-P-26, HAT-P-29 eccentric planetary systems
• The ultra-hot-Jupiter KELT-16 b: Dynamical Evolution and Atmospheric Properties
• Looking For Timing Variations in the Transits of 16 Exoplanets
• HSTEP -- Homogeneous Studies of Transiting Extrasolar Planets
• The study on transiting systems HAT-P-13, HAT-P-16 and WASP-32 through combining ground-based and TESS photometry