J/A+A/623/A114 Light curve of K2-292 (HD 119130) (Luque+, 2019)
Detection and characterisation of an ultra-dense sub-Neptune planet orbiting the
Sun-like star K2-292.
Luque R., Nowak G., Palle E., Dai F., Kaminski A., Nagel E., Hidalgo D.,
Bauer F., Lafarga M., Livingston J., Barragan 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., Eigmueller P., 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., Montanes-Rodriguez P.,
Narita N., Nespral D., Niraula P., Paetzold M., Persson C.M.,
Prieto-Arranz J., Quirrenbach A., Rauer H., Redfield S., Reiners A.,
Ribas I., Smith A.M.S.
<Astron. Astrophys. 623, A114 (2019)>
=2019A&A...623A.114L 2019A&A...623A.114L (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Photometry
Keywords: planetary systems - techniques: photometric -
techniques: radial velocities - techniques: high angular resolution -
stars: individual: K2-292
Abstract:
We present the discovery and characterisation 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-d orbit around a bright
(V=9.9mag) solar-like G3 V star with a mass and radius of
Ms=1.00±0.03M☉ and Rs=1.09±0.03R☉ respectively. We
model simultaneously the K2 photometry and CARMENES spectroscopic data
and derive a radius of Rp=2.63-0.10++0.12^R{earth} and mass of
Mp=24.5-4.4+4.4M{earth}, yielding a mean density of
7.4-1.5+1.6g/cm3, which makes it one of the densest sub-Neptune
planets known to date. We also detect a linear trend in radial
velocities of HD 119130 that suggests a long-period companion with a
minimum mass on the order of 33M{earth}. If confirmed, it would
support a formation scenario of K2-292 b by migration caused by
Kozai-Lidov oscillations.
Description:
he K2 Field 17 was observed from March 1st until May 8th 2018, in the
direction of the constellation of Virgo. Among the 34398 long-cadence
(29.4-min integration time) targets was K2-292 (HD 119130, EPIC
212628254). We downloaded the target pixel files from the Mikulski
Archive for Space Telescopes (MAST) and extracted the light curve
using an independent method based on the implementation of the pixel
level decorrelation model (Deming et al., 2015ApJ...805..132D 2015ApJ...805..132D) using a
customised version of the Everest pipeline (Luger et al.,
2018AJ....156...99L 2018AJ....156...99L). The details of this procedure are described in
Palle et al. (2019A&A...623A..41P 2019A&A...623A..41P).
Objects:
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RA (2000) DE Designation(s)
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13 41 30.30 -09 56 45.9 K2-292 = HD 119130
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 46 3057 K2-292 light curve from K2 Campaign 17
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 13 F13.8 d JD Julian date of observation (JD-2454833)
15- 28 F14.12 --- Flux Relative flux
30- 46 E17.11 --- e_Flux Relative flux error
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Acknowledgements:
Rafael Luque, rluque(at)iac.es
(End) Rafael Luque [IAC, Spain], Patricia Vannier [CDS] 29-Jan-2019