HATS-11b and HATS-12b: Two transiting Hot Jupiters orbiting sub-solar metallicity stars selected for the K2 Campaign 7
arXiv:1603.02894 · doi:10.3847/0004-6256/152/4/88
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 12.9 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 1.000 0.060 M, a radius of 1.444 0.057 M and an effective temperature of 6060 150 K, while its companion is a 0.85 0.12 M, 1.510 0.078 R 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-12, our measurements indicate that this is a 2.38 0.11 M, 1.35 0.17 R planet in a circular orbit. Both host stars show sub-solar metallicity of -0.390 0.060 dex and -0.100 0.040 dex, respectively and are (slightly) evolved stars. In fact, HATS-11 is amongst the most metal-poor and, HATS-12 is amongst 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).
arXiv comment14 pages, 7 figures, 6 tables, submitted to AJ
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