Bibcode
Smith, A. M. S.; Gandolfi, D.; Barragán, O.; Bowler, B.; Csizmadia, Sz.; Endl, M.; Fridlund, M. C. V.; Grziwa, S.; Guenther, E.; Hatzes, A. P.; Nowak, G.; Albrecht, S.; Alonso, R.; Cabrera, J.; Cochran, W. D.; Deeg, H. J.; Cusano, F.; Eigmüller, Ph.; Erikson, A.; Hidalgo, D.; Hirano, T.; Johnson, M. C.; Korth, J.; Mann, A.; Narita, N.; Nespral, D.; Palle, E.; Pätzold, M.; Prieto-Arranz, J.; Rauer, H.; Ribas, I.; Tingley, B.; Wolthoff, V.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 464, Issue 3, p.2708-2716
Advertised on:
1
2017
Citations
30
Refereed citations
28
Description
We report the discovery from K2 of a transiting planet in an 18.25-d,
eccentric (0.19 ± 0.04) orbit around K2-99, an 11th magnitude
subgiant in Virgo. We confirm the planetary nature of the companion with
radial velocities, and determine that the star is a metal-rich ([Fe/H] =
0.20 ± 0.05) subgiant, with mass 1.60^{+0.14}_{-0.10}
M⊙ and radius 3.1 ± 0.1 R⊙. The
planet has a mass of 0.97 ± 0.09 MJup and a radius
1.29 ± 0.05 RJup. A measured systemic radial
acceleration of -2.12 ± 0.04 ms-1 d-1
offers compelling evidence for the existence of a third body in the
system, perhaps a brown dwarf orbiting with a period of several hundred
days.
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Enric
Pallé Bago