Bibcode
Luque, R.; Nowak, G.; Pallé, E.; Dai, F.; Kaminski, A.; Nagel, E.; Hidalgo, D.; Bauer, F.; Lafarga, M.; Livingston, J.; Barragán, O.; Hirano, T.; Fridlund, M.; Gandolfi, D.; Justesen, A. B.; Hjorth, M.; Van Eylen, V.; Winn, J. N.; Esposito, M.; Morales, J. C.; Albrecht, S.; Alonso, R.; Amado, P. J.; Beck, P.; Caballero, J. A.; Cabrera, J.; Cochran, W. D.; Csizmadia, Sz.; Deeg, H.; Eigmüller, Ph.; Endl, M.; Erikson, A.; Fukui, A.; Grziwa, S.; Guenther, E. W.; Hatzes, A. P.; Knudstrup, E.; Korth, J.; Lam, K. W. F.; Lund, M. N.; Mathur, S.; Montañes-Rodríguez, P.; Narita, N.; Nespral, D.; Niraula, P.; Pätzold, M.; Persson, C. M.; Prieto-Arranz, J.; Quirrenbach, A.; Rauer, H.; Redfield, S.; Reiners, A.; Ribas, I.; Smith, A. M. S.
Bibliographical reference
Astronomy and Astrophysics, Volume 623, id.A114, 9 pp.
Advertised on:
3
2019
Journal
Citations
16
Refereed citations
15
Description
We present the discovery and characterization of a new transiting planet
from Campaign 17 of the Kepler extended mission K2. The planet K2-292 b
is a warm sub-Neptune on a 17 day orbit around a bright (V = 9.9 mag)
solar-like G3 V star with a mass and radius of M⋆ = 1.00
± 0.03 M⊙ and R⋆ = 1.09 ±
0.03 R⊙, respectively. We modeled simultaneously the K2
photometry and CARMENES spectroscopic data and derived a radius of
Rp=2.63-0.10+0.12 R⊕
and mass of Mp=24.5-4.4+4.4
M⊕, yielding a mean density of
ρp=7.4-1.5+1.6 g cm-3,
which makes it one of the densest sub-Neptunian planets known to date.
We also detected a linear trend in the radial velocities of K2-292
(γ˙RV = -0.40-0.07+0.07 m
s-1 d-1) that suggests a long-period companion
with a minimum mass on the order of 33 M⊕. If
confirmed, it would support a formation scenario of K2-292 b by
migration caused by Kozai-Lidov oscillations.
The light curve is only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr
(ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/623/A114
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