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K2-99 : A subgiant hosting a transiting warm Jupiter in an eccentric orbit and a long-period companion

Smith, A. M.S. ; Gandolfi, D. ; Barragán, O. ; Bowler, B. ; Csizmadia, Sz ; Endl, M. ; Fridlund, M. C.V. ; Grziwa, S. ; Guenther, E. and Hatzes, A. P. , et al. (2017) In Monthly Notices of the Royal Astronomical Society 464(3). p.2708-2716
Abstract

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 con- firm 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 m s-1d-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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publishing date
type
Contribution to journal
publication status
published
keywords
Planetary systems, Planets and satellites: detection, Planets and satellites: individual: K2-99
in
Monthly Notices of the Royal Astronomical Society
volume
464
issue
3
pages
9 pages
publisher
Oxford University Press
external identifiers
  • scopus:85006354711
ISSN
0035-8711
DOI
10.1093/mnras/stw2487
language
English
LU publication?
no
additional info
Publisher Copyright: © 2016 The Authors.
id
e47ec570-9dfd-42a3-a455-a1ae55ced51b
date added to LUP
2023-02-03 09:31:08
date last changed
2023-02-20 16:22:13
@article{e47ec570-9dfd-42a3-a455-a1ae55ced51b,
  abstract     = {{<p>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 con- firm 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 m s-1d-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.</p>}},
  author       = {{Smith, A. M.S. and Gandolfi, D. and Barragán, O. and Bowler, B. and Csizmadia, Sz and Endl, M. and Fridlund, M. C.V. and Grziwa, S. and Guenther, E. and Hatzes, A. P. and Nowak, G. and Albrecht, S. and Alonso, R. and Cabrera, J. and Cochran, W. D. and Deeg, H. J. and Cusano, F. and Eigmüller, Ph and Erikson, A. and Hidalgo, D. and Hirano, T. and Johnson, M. C. and Korth, J. and Mann, A. and Narita, N. and Nespral, D. and Palle, E. and Pätzold, M. and Prieto-Arranz, J. and Rauer, H. and Ribas, I. and Tingley, B. and Wolthoff, V.}},
  issn         = {{0035-8711}},
  keywords     = {{Planetary systems; Planets and satellites: detection; Planets and satellites: individual: K2-99}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{3}},
  pages        = {{2708--2716}},
  publisher    = {{Oxford University Press}},
  series       = {{Monthly Notices of the Royal Astronomical Society}},
  title        = {{K2-99 : A subgiant hosting a transiting warm Jupiter in an eccentric orbit and a long-period companion}},
  url          = {{http://dx.doi.org/10.1093/mnras/stw2487}},
  doi          = {{10.1093/mnras/stw2487}},
  volume       = {{464}},
  year         = {{2017}},
}