Two New HATNet Hot Jupiters around A Stars and the First Glimpse at the Occurrence Rate of Hot Jupiters from TESS

G. Zhou, C. X. Huang, G. Bakos, J. D. Hartman, David W. Latham, S. N. Quinn, K. A. Collins, J. N. Winn, I. Wong, G. Kovács, Z. Csubry, W. Bhatti, K. Penev, A. Bieryla, G. A. Esquerdo, P. Berlind, M. L. Calkins, M. De Val-Borro, R. W. Noyes, J. LázárI. Papp, P. Sári, T. Kovács, Lars A. Buchhave, T. Szklenar, B. Béky, M. C. Johnson, W. D. Cochran, A. Y. Kniazev, K. G. Stassun, B. J. Fulton, A. Shporer, N. Espinoza, D. Bayliss, M. Everett, S. B. Howell, C. Hellier, D. R. Anderson, A. Collier Cameron, R. G. West, D. J.A. Brown, N. Schanche, K. Barkaoui, F. Pozuelos, M. Gillon, E. Jehin, Z. Benkhaldoun, A. Daassou, G. Ricker, R. Vanderspek, S. Seager, J. M. Jenkins, Jack J. Lissauer, J. D. Armstrong, K. I. Collins, T. Gan, R. Hart, K. Horne, J. F. Kielkopf, L. D. Nielsen, T. Nishiumi, N. Narita, E. Palle, H. M. Relles, R. Sefako, T. G. Tan, M. Davies, Robert F. Goeke, N. Guerrero, K. Haworth, S. Villanueva

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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 M Jup and a radius of $ R Jup and resides in a prograde 4.79 day orbit. HAT-P-70 b has a radius of R Jup and a mass constraint of 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.

Original languageEnglish (US)
Article number141
JournalAstronomical Journal
Volume158
Issue number4
DOIs
StatePublished - 2019

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • planetary systems
  • stars: individual (HAT-P-69,HAT-P-70, TIC379929661, TIC399870368)
  • techniques: photometric
  • techniques: spectroscopic

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    Zhou, G., Huang, C. X., Bakos, G., 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., Val-Borro, M. D., Noyes, R. W., ... 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, 158(4), [141]. https://doi.org/10.3847/1538-3881/ab36b5