HATS-15b and HATS-16b: Two massive planets transiting old G Dwarf Stars

S. Ciceri, L. Mancini, T. Henning, G. Bakos, K. Penev, R. Brahm, G. Zhou, J. D. Hartman, D. Bayliss, A. Jordán, Z. Csubry, M. de Val-Borro, W. Bhatti, M. Rabus, N. Espinoza, V. Suc, B. Schmidt, R. Noyes, A. W. Howard, B. J. FultonH. Isaacson, G. W. Marcy, R. P. Butler, P. Arriagada, J. D. Crane, S. Shectman, I. Thompson, T. G. Tan, J. Lázár, I. Papp, P. Sári

Research output: Contribution to journalArticle

2 Citations (Scopus)


We report the discovery of HATS-15 b and HATS-16 b, two massive transiting extrasolar planets orbiting evolved (∼10 Gyr) main-sequence stars. The planet HATS-15 b, which is hosted by a G9 V star (V = 14.8 mag), is a hot Jupiter with mass of 2.17 ± 0.15 MJ and radius of 1.105 ± 0.040 RJ, and it completes its orbit in about 1.7 days. HATS-16 b is a very massive hot Jupiter with mass of 3.27 ± 0.19 MJ and radius of 1.30 ± 0.15 RJ; it orbits around its G3 V parent star (V = 13.8 mag) in ∼2.7 days. HATS-16 is slightly active and shows a periodic photometric modulation, implying a rotational period of 12 days, which is unexpectedly short given its isochronal age. This fast rotation might be the result of the tidal interaction between the star and its planet.

Original languageEnglish
Article number074401
JournalPublications of the Astronomical Society of the Pacific
Issue number965
Publication statusPublished - Jul 1 2016



  • Planets and satellites: Detection
  • Stars: Fundamental parameters

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Ciceri, S., Mancini, L., Henning, T., Bakos, G., Penev, K., Brahm, R., Zhou, G., Hartman, J. D., Bayliss, D., Jordán, A., Csubry, Z., de Val-Borro, M., Bhatti, W., Rabus, M., Espinoza, N., Suc, V., Schmidt, B., Noyes, R., Howard, A. W., ... Sári, P. (2016). HATS-15b and HATS-16b: Two massive planets transiting old G Dwarf Stars. Publications of the Astronomical Society of the Pacific, 128(965), [074401]. https://doi.org/10.1088/1538-3873/128/965/074401