J/A+A/601/A128 K2-19b and K2-19c radial velocity curves (Nespral+, 2017)
Mass determination of K2-19b and K2-19c from radial velocities and transit
timing variations.
Nespral D., Gandolfi D., Deeg H.J., Borsato L., Fridlund M.C.V, Barrag O.,
Alonso R., Grziwa S., Korth J., Albrecht S., Cabrera J., Csizmadia Sz.,
Nowak G., Kuutma T., Saario J., Eigmuller P., Erikson A., Guenther E.W,
Hatzes A.P., Montanes Rodriguez P., Palle E., Patzold M., Prieto-Arranz J.,
Rauer H., Sebastian D.
<Astron. Astrophys. 601, A128 (2017)>
=2017A&A...601A.128N 2017A&A...601A.128N (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Planets ; Radial velocities
Keywords: stars: individual: K2-19 -
planets and satellites: fundamental parameters -
techniques: radial velocities - techniques: spectroscopic -
stars: fundamental parameters
Abstract:
We present radial velocity follow-up observations of K2-19,a compact
planetary system hosting three planets, of which the two larger ones,
K2-19b and K2-19c, are close to the 3:2 mean motion resonance. An
analysis considering only the radial velocity measurements detects
K2-19b, the larger and more massive planet in the system, with a mass
of 54.8±7.5M{earth} provides a marginal detection of K2-19c, with
a mass of Mc,=5.9+7.6-4.3M{earth}. We also used the TRADES code
to simultaneously model both our RV measurements and the existing
transit timing measurements. We derived a mass of 54.4±8.9M{earth}
for K2-19b and of 7.5+3.0-1.4M{earth} for K2-19c. For K2-19b,
these masses are consistent with a previous determination that was
principally based on a photodynamical analysis of the K2-19 light
curve. Differences remain mainly in the mass determination of the more
lightweight planet, driven likely by the limited precision of the RV
measurements and possibly some as yet unrecognized systematics.
Description:
FIES, HARPS-N, HARPS Radial velocity follow-up observations of K2-19.
Objects:
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RA (2000) DE Designation(s)
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11 39 50.48 +00 36 12.9 K2-19 = UCAC4 454-050261
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 43 22 Radial Velocity measurements of K2-19
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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- 7 A7 --- Inst Instrument (FIES, HARPS-N or HARPS)
9- 18 F10.5 d BJD Observation Time (BJD-2450000) TDB
21- 26 F6.4 km/s RV Radial Velocity
29- 34 F6.4 km/s e_RV Error Radial Velocity
37- 43 F7.4 km/s BisSpan CCF bisector span
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Acknowledgements:
David Nespral, dnespral(at)iac.es
(End) Patricia Vannier [CDS] 10-Apr-2017