Two new HATNet hot Jupiters around A stars, and the first glimpse at the occurrence rate of hot Jupiters from TESS*
Abstract
Wide-field surveys for transiting planets are well suited to searching diverse stellar populations, enabling a better understanding of the link between the properties of planets and their parent stars. We report the discovery of HAT-P-69 b (TOI 625.01) and HAT-P-70 b (TOI 624.01), two new hot Jupiters around A stars from the Hungarian-made Automated Telescope Network (HATNet) survey that have also been observed by the Transiting Exoplanet Survey Satellite. HAT-P-69 b has a mass of 3.58+0.58/-0.58 M Jup and a radius of 1.676+0.051/-0.033 R Jup and resides in a prograde 4.79 day orbit. HAT-P-70 b has a radius of 1.87+0.15/-0.10 R Jup and a mass constraint of <6.78 (3σ) M Jup and resides in a retrograde 2.74 day orbit. We use the confirmation of these planets around relatively massive stars as an opportunity to explore the occurrence rate of hot Jupiters as a function of stellar mass. We define a sample of 47,126 main-sequence stars brighter than T mag = 10 that yields 31 giant planet candidates, including 18 confirmed planets, 3 candidates, and 10 false positives. We find a net hot Jupiter occurrence rate of 0.41 ± 0.10% within this sample, consistent with the rate measured by Kepler for FGK stars. When divided into stellar mass bins, we find the occurrence rate to be 0.71 ± 0.31% for G stars, 0.43 ± 0.15% for F stars, and 0.26 ± 0.11% for A stars. Thus, at this point, we cannot discern any statistically significant trend in the occurrence of hot Jupiters with stellar mass.
Citation
Zhou , G , Huang , C X , Bakos , G Á , Hartman , J D , Latham , D W , Quinn , S N , Collins , K A , Winn , J N , Wong , I , Kovács , G , Csubry , Z , Bhatti , W , Penev , K , Bieryla , A , Esquerdo , G A , Berlind , P , Calkins , M L , de Val-Borro , M , Noyes , R W , Lázár , J , Papp , I , Sári , P , Kovács , T , Buchhave , L A , Szklenar , T , Béky , B , Johnson , M C , Cochran , W D , Kniazev , A Y , Stassun , K G , Fulton , B J , Shporer , A , Espinoza , N , Bayliss , D , Everett , M , Howell , S B , Hellier , C , Anderson , D R , Cameron , A C , West , R G , Brown , D J A , Schanche , N , Barkaoui , K , Pozuelos , F , Gillon , M , Jehin , E , Benkhaldoun , Z , Daassou , A , Ricker , G , Vanderspek , R , Seager , S , Jenkins , J M , Lissauer , J J , Armstrong , J D , Collins , K I , Gan , T , Hart , R , Horne , K , Kielkopf , J F , Nielsen , L D , Nishiumi , T , Narita , N , Palle , E , Relles , H M , Sefako , R , Tan , T G , Davies , M , Goeke , R F , Guerrero , N , Haworth , K & Villanueva , S 2019 , ' Two new HATNet hot Jupiters around A stars, and the first glimpse at the occurrence rate of hot Jupiters from TESS * ' , Astronomical Journal , vol. 158 , no. 4 , 141 , pp. 1-24 . https://doi.org/10.3847/1538-3881/ab36b5
Publication
Astronomical Journal
Status
Peer reviewed
ISSN
0004-6256Type
Journal article
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