Qatar Exoplanet Survey: Qatar-7b -- A Very Hot Jupiter Orbiting a Metal Rich F-Star
arXiv:1812.05601 · doi:10.3847/1538-3881/aaf80a
Abstract
We present the discovery of Qatar-7b --- a very hot and inflated giant gas planet orbiting close its parent star. The host star is a relatively massive main sequence F-star with mass and radius Mstar = 1.41 +/- 0.03 Msun and Rstar = 1.56 +/- 0.02 Rsun, respectively, at a distance d = 726 +/- 26 pc, and an estimated age ~1 Gyr. With its orbital period of P = 2.032 days the planet is located less than 5 stellar radii from its host star and is heated to a high temperature Teq ~ 2100 K. From a global solution to the available photometric and radial velocity observations, we calculate the mass and radius of the planet to be Mpl = 1.88 +/- 0.25 Mjup and Rpl = 1.70 +/- 0.03 Rjup, respectively. The planet radius and equilibrium temperature put Qatar-7b in the top 6% of the hottest and largest known exoplanets. With its large radius and high temperature Qatar-7b is a valuable addition to the short list of targets that offer the best opportunity for studying their atmospheres through transmission spectroscopy.
References in corpus (24)
- Planet formation around stars of various masses: The snow line and the frequency of giant planets
- Tidal Evolution of Close-in Extra-Solar Planets
- A giant planet undergoing extreme ultraviolet irradiation by its hot massive-star host
- Retired A Stars and Their Companions: Exoplanets Orbiting Three Intermediate-Mass Subgiants
- Precise Radial Velocities of Giant Stars VII. Occurrence Rate of Giant Extrasolar Planets as a Function of Mass and Metallicity
- A fast hybrid algorithm for exoplanetary transit searches
- Hot Jupiters and Cool Stars
- 197 Candidates and 104 Validated Planets in K2's First Five Fields
- A New Algorithm For Difference Image Analysis
- KELT-20b: A giant planet with a period of P~ 3.5 days transiting the V~ 7.6 early A star HD 185603
- Observational evidence for two distinct giant planet populations
- Retired A Stars and Their Companions II: Jovian planets orbiting kappa Coronae Borealis and HD167042
- On the Semimajor Axis Distribution of Extrasolar Gas Giant Planets: Why Hot Jupiters Are Rare Around High-Mass Stars
- KELT-17b: A hot-Jupiter transiting an A-star in a misaligned orbit detected with Doppler tomography
- HAT-P-65b and HAT-P-66b: Two Transiting Inflated Hot Jupiters and Observational Evidence for the Re-Inflation of Close-In Giant Planets
- Transiting exoplanets from the CoRoT space mission XIV. CoRoT-11b: a transiting massive "hot-Jupiter" in a prograde orbit around a rapidly rotating F-type star
- OGLE2-TR-L9: An extrasolar planet transiting a fast-rotating F3 star
- Discrepancies between isochrone fitting and gyrochronology for exoplanet host stars?
- Extrasolar planets and brown dwarfs around AF-type stars. IX. The HARPS southern sample
- HIP 114328: a new refractory-poor and Li-poor solar twin
- The `666' collaboration on OGLE transits: I. Accurate radius of the planets OGLE-TR-10b and OGLE-TR-56b with VLT deconvolution photometry
- Shallow extra mixing in solar twins inferred from Be abundances
- The GTC exoplanet transit spectroscopy survey. VII. An optical transmission spectrum of WASP-48b
- The DOHA algorithm: a new recipe for cotrending large-scale transiting exoplanet survey light curves