Qatar Exoplanet Survey: Qatar-6b-A Grazing Transiting Hot Jupiter

• Published in: The Astronomical journal Vol. 155; no. 2; pp. 52 - 62
• Main Authors: Alsubai, Khalid, Tsvetanov, Zlatan I., Latham, David W., Bieryla, Allyson, Esquerdo, Gilbert A., Mislis, Dimitris, Pyrzas, Stylianos, Foxell, Emma, McCormac, James, Baranec, Christoph, Vilchez, Nicolas P. E., West, Richard, Esamdin, Ali, Dang, Zhenwei, Dalee, Hani M., Al-Rajihi, Amani A., Al-Harbi, Abeer Kh
• Format: Journal Article
• Language: English
• Published: Madison The American Astronomical Society 01.02.2018; IOP Publishing
• Subjects: Astronomy; Extrasolar planets; Gas giant planets; Grazing; Jupiter; Light curve; Main sequence stars; Photometry; Planet detection; Planetary orbits; Planetary systems; planets and satellites: detection; planets and satellites: fundamental parameters; Polls & surveys; techniques: photometric; Transit; Qatar
• ISSN: 0004-6256; 1538-3881
• DOI: 10.3847/1538-3881/aaa000

We report the discovery of Qatar-6b, a new transiting planet identified by the Qatar Exoplanet Survey (QES). The planet orbits a relatively bright (V = 11.44), early-K main-sequence star at an orbital period of P ∼ 3.506 days. An SED fit to available multi-band photometry, ranging from the near-UV to the mid-IR, yields a distance of d = 101 6 pc to the system. From a global fit to follow-up photometric and spectroscopic observations, we calculate the mass and radius of the planet to be MP = 0.67 0.07 MJ and RP = 1.06 0.07 RJ, respectively. We use multi-color photometric light curves to show that the transit is grazing, making Qatar-6b one of the few exoplanets known in a grazing transit configuration. It adds to the short list of targets that offer the best opportunity to look for additional bodies in the host planetary system through variations in the transit impact factor and duration.