Discovery of WASP-113b and WASP-114b, two inflated hot-Jupiters with contrasting densities

Abstract

We present the discovery and characterisation of the exoplanets WASP-113b and WASP-114b by the WASP survey, {\it SOPHIE} and {\it CORALIE}. The planetary nature of the systems was established by performing follow-up photometric and spectroscopic observations. The follow-up data were combined with the WASP-photometry and analysed with an MCMC code to obtain system parameters. The host stars WASP-113 and WASP-114 are very similar. They are both early G-type stars with an effective temperature of $\sim 5900$K, [Fe/H]$\sim 0.12$ and $T_{\mathrm{eff}}$ $\sim 4.1$dex. However, WASP-113 is older than WASP-114. Although the planetary companions have similar radii, WASP-114b is almost 4 times heavier than WASP-113b. WASP-113b has a mass of $0.48$ ${\mathrm{M}}_{\mathrm{Jup}}$ and an orbital period of $\sim 4.5$days; WASP-114b has a mass of $1.77$ ${\mathrm{M}}_{\mathrm{Jup}}$ and an orbital period of $\sim 1.5$days. Both planets have inflated radii, in particular WASP-113 with a radius anomaly of $\Re =0.35$. The high scale height of WASP-113b ($\sim 950$ km ) makes it a good target for follow-up atmospheric observations.

arXiv comment9 pages, 6 figures, 5 tables, accepted for publication in A&A

References in corpus (45)

• PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
• Analytic Lightcurves for Planetary Transit Searches
• The Dartmouth Stellar Evolution Database
• The K2 Mission: Characterization and Early results
• Evolution of asymptotic giant branch stars II. Optical to far-infrared isochrones with improved TP-AGB models
• Accurate masses and radii of normal stars: modern results and applications
• Detection of Planetary Transits Across a Sun-like Star
• Detection of an Extrasolar Planet Atmosphere
• The WASP Project and the SuperWASP Cameras
• Planetary Radii across Five Orders of Magnitude in Mass and Stellar Insolation: Application to Transits
• Infrared radiation from an extrasolar planet
• A Technique for Extracting Highly Precise Photometry for the Two-Wheeled Kepler Mission
• The CORALIE survey for southern extra-solar planets VII. Two short-period Saturnian companions to HD108147 and HD168746
• Correcting systematic effects in a large set of photometric lightcurves
• The Interiors of Giant Planets: Models and Outstanding Questions
• Evolution of "51Peg b-like" Planets
• Possible Solutions to the Radius Anomalies of Transiting Giant Planets
• Efficient identification of exoplanetary transit candidates from SuperWASP light curves
• The Mass of KOI-94d and a Relation for Planet Radius, Mass, and Incident Flux
• The Broadband Infrared Emission Spectrum of the Exoplanet HD 189733b
• Strong Water Absorption in the Dayside Emission Spectrum of the Planet HD 189733b
• A Trend Filtering Algorithm for wide field variability surveys
• Time scales of Li evolution: a homogeneous analysis of open clusters from ZAMS to late-MS
• Lack of Inflated Radii for Kepler Giant Planet Candidates Receiving Modest Stellar Irradiation
• Determining stellar macroturbulence using asteroseismic rotational velocities from Kepler
• WASP-3b: a strongly-irradiated transiting gas-giant planet
• A fast hybrid algorithm for exoplanetary transit searches
• On the Anomalous Radii of the Transiting Extrasolar Planets
• Angular Momentum Loss from Cool Stars: An Empirical Expression and Connection to Stellar Activity
• Falling Transiting Extrasolar Giant Planets
• Evolution of Ohmically Heated Hot Jupiters
• TRAPPIST: a robotic telescope dedicated to the study of planetary systems
• WASP-42 b and WASP-49 b: two new transiting sub-Jupiters
• An Improved Method for Estimating the Masses of Stars with Transiting Planets
• The SOPHIE search for northern extrasolar planets III. A Jupiter-mass companion around HD 109246
• New planetary and EB candidates from Campaigns 1-6 of the K2 mission
• Accurate spectroscopic parameters of WASP planet host stars
• Re-inflated Warm Jupiters Around Red Giants
• A comparison of gyrochronological and isochronal age estimates for transiting exoplanet host stars
• Thermal Processes Governing Hot-Jupiter Radii
• Discrepancies between isochrone fitting and gyrochronology for exoplanet host stars?
• WASP-38b: A Transiting Exoplanet in an Eccentric, 6.87d Period Orbit
• A Search for Photometric Variability Towards M71 with the Near-Infrared Transiting ExoplanetS Telescope
• A lower mass for the exoplanet WASP-21b
• RISE: a fast-readout imager for exoplanet transit timing

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