Qatar Exoplanet Survey: Qatar-7b-A Very Hot Jupiter Orbiting a Metal-rich F-Star

• Published in: The Astronomical journal Vol. 157; no. 2; pp. 74 - 82
• Main Authors: Alsubai, Khalid, Tsvetanov, Zlatan I., Latham, David W., Bieryla, Allyson, Pyrzas, Stylianos, Mislis, Dimitris, Esquerdo, Gilbert A., Esamdin, Ali, Liu, Jinzhong, Ma, Lu, Bretton, Marc, Pallé, Enric, Murgas, Felipe, Vilchez, Nicolas P. E., Morton, Timothy D., Parviainien, Hannu, Montañes-Rodriguez, Pilar, Narita, Norio, Fukui, Akihiko, Kusakabe, Nobuhiko, Tamura, Motohide
• Format: Journal Article
• Language: English
• Published: Madison The American Astronomical Society 01.02.2019; IOP Publishing
• Subjects: Astronomy; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; DETECTION; Extrasolar planets; F stars; Gas giant planets; High temperature; Jupiter; MASS; Orbits; Planet detection; PLANETARY ATMOSPHERES; planetary systems; PLANETS; planets and satellites: detection; planets and satellites: fundamental parameters; RADIAL VELOCITY; SATELLITES; Spectroscopy; STARS; Stellar systems; techniques: photometric; Qatar
• ISSN: 0004-6256; 1538-3881; 1538-3881
• DOI: 10.3847/1538-3881/aaf80a

We present the discovery of Qatar-7b-a very hot and inflated giant gas planet orbiting close to its parent star. The host star is a relatively massive main-sequence F-star with mass and radius and , 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 five 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 = 1.88 0.25 and = 1.70 0.03 , 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.