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. Sari

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

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 (US)
Article number074401
JournalPublications of the Astronomical Society of the Pacific
Volume128
Issue number965
DOIs
StatePublished - Jul 2016

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Planets and satellites: Detection
  • Stars: Fundamental parameters

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    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., ... Sari, 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