HATS-50b through HATS-53b: Four Transiting Hot Jupiters Orbiting G-type Stars Discovered by the HATSouth Survey

T. Henning, L. Mancini, P. Sarkis, G. Bakos, J. D. Hartman, D. Bayliss, J. Bento, W. Bhatti, R. Brahm, S. Ciceri, Z. Csubry, M. De Val-Borro, N. Espinoza, B. J. Fulton, A. W. Howard, H. T. Isaacson, A. Jordán, G. W. Marcy, K. Penev, M. RabusV. Suc, T. G. Tan, C. G. Tinney, D. J. Wright, G. Zhou, S. Durkan, J. Lazar, I. Papp, P. Sari

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


We report the discovery of four close-in transiting exoplanets (HATS-50b through HATS-53b), discovered using the HATSouth three-continent network of homogeneous and automated telescopes. These new exoplanets belong to the class of hot Jupiters and orbit G-type dwarf stars, with brightness in the range V = 12.5-14.0 mag. While HATS-53 has many physical characteristics similar to the Sun, the other three stars appear to be metal-rich ([Fe H] = 0.2-0.3), larger, and more massive. Three of the new exoplanets, namely HATS-50b, HATS-51b, and HATS-53b, have low density (HATS-50b: 0.39 ± 0.10 MJ, 1.130 ± 0.075 RJ; HATS-51b: 0.768 ± 0.045 MJ, 1.41 ± 0.19 RJ; HATS-53b: 0.595 ± 0.089 MJ, 1.340 ± 0.056 RJ) and similar orbital periods (3.8297 days, 3.3489 days, 3.8538 days, respectively). Instead, HATS-52b is more dense (mass 2.24 ± 0.15 MJ and radius 1.382 ± 0.086 RJ) and has a shorter orbital period (1.3667 days). It also receives an intensive radiation from its parent star and, consequently, presents a high equilibrium temperature (Teq = 1834 ± 73 K). HATS-50 shows a marginal additional transit feature consistent with an ultra-short-period hot super Neptune (upper mass limit 0.16 MJ), which will be able to be confirmed with TESS photometry.

Original languageEnglish
Article number79
JournalAstronomical Journal
Issue number2
StatePublished - Feb 2018
Externally publishedYes


  • stars: individual (HATS-50, HATS-51, HATS-52, HATS-53)
  • techniques: photometric


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