K2-99: a subgiant hosting a transiting warm Jupiter in an eccentric orbit and a long-period companion
Artikel i vetenskaplig tidskrift, 2017
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 (circle dot) and radius 3.1 +/- 0.1 R-circle dot. The planet has a mass of 0.97 +/- 0.09 M-Jup and a radius 1.29 +/- 0.05 R-Jup. 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.
planets and satellites: individual: K2-99
planets and satellites: detection
planetary system
Författare
A. M. S. Smith
D. Gandolfi
O. Barragan
B. Bowler
S. Csizmadia
M. Endl
Malcolm Fridlund
Chalmers, Rymd- och geovetenskap, Radioastronomi och astrofysik
S. Grziwa
E. W. Guenther
A. Hatzes
G. Nowak
S. Albrecht
R. Alonso
J. Cabrera
W. D. Cochran
H. J. Deeg
F. Cusano
P. Eigmuller
A. Erikson
D. Hidalgo
T. Hirano
M. C. Johnson
J. Korth
A. Mann
N. Narita
D. Nespral
E. Palle
M. Patzold
J. Prieto-Arranz
H. Rauer
I. Ribas
B. Tingley
V. Wolthoff
Publicerad i
Monthly Notices of the Royal Astronomical Society
0035-8711 (ISSN) 1365-2966 (eISSN)
Vol. 464 Nummer/häfte 3 s. 2708-2716Kategorisering
Drivkrafter
Hållbar utveckling
Ämneskategorier (SSIF 2011)
Astronomi, astrofysik och kosmologi
Fundament
Grundläggande vetenskaper
Infrastruktur
Onsala rymdobservatorium
Identifikatorer
DOI
10.1093/mnras/stw2487