HATS-11B and HATS-12B

two transiting hot Jupiters orbiting subsolar metallicity stars selected for the k2 campaign 7

M. Rabus, A. Jordán, J. D. Hartman, G. Bakos, N. Espinoza, R. Brahm, K. Penev, S. Ciceri, G. Zhou, D. Bayliss, L. Mancini, W. Bhatti, M. De Val-Borro, Z. Csbury, B. Sato, T. -G. Tan, T. Henning, B. Schmidt, J. Bento, V. Suc & 4 others R. Noyes, J. Lázár, I. Papp, P. Sári

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We report the discovery of two transiting extrasolar planets from the HATSouth survey. HATS-11, a V = 14.1 G0-star shows a periodic mmag dip in its light curve every 3.6192 days and a radial velocity variation consistent with a Keplerian orbit. HATS-11 has a mass of 1.0000 0.060 M, a radius of 1.444 ± 0.057 R and an effective temperature of 6060 ± 150 K, while its companion is a 0.85 ± 0.12 MJ, 1.510 ± 0.078 RJ planet in a circular orbit. HATS-12 shows a periodic 5.1 mmag flux decrease every 3.1428 days and Keplerian RV variations around a V = 12.8 F-star. HATS-12 has a mass of 1.489 ± 0.071 M, a radius of 2.21 ± 0.21 R, and an effective temperature of 6408 ± 75 K. For HATS-12b, our measurements indicate that this is a 2.38 ± 0.11 MJ, 1.35 ± 0.17 RJ planet in a circular orbit. Both host stars show subsolar metallicities of -0.390 ± 0.060 dex and dex, respectively, and are (slightly) evolved stars. In fact, HATS-11 is among the most metal-poor and, HATS-12, with a log g of 3.923 0.0065, is among the most evolved stars hosting a hot-Jupiter planet. Importantly, HATS-11 and HATS-12 have been observed in long cadence by Kepler as part of K2 campaign 7 (EPIC216414930 and EPIC218131080 respectively).

Original languageEnglish
Article number88
Pages (from-to)1-13
Number of pages13
JournalAstronomical Journal
Volume152
Issue number4
DOIs
Publication statusPublished - 1 Oct 2016
Externally publishedYes

Keywords

  • planetary systems
  • stars: individual (HATS-11 - HATS-12)
  • techniques: photometric
  • techniques: spectroscopic

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    Rabus, M., Jordán, A., Hartman, J. D., Bakos, G., Espinoza, N., Brahm, R., ... Sári, P. (2016). HATS-11B and HATS-12B: two transiting hot Jupiters orbiting subsolar metallicity stars selected for the k2 campaign 7. Astronomical Journal, 152(4), 1-13. [88]. https://doi.org/10.3847/0004-6256/152/4/88