J/A+A/636/L6 HD 158259 SOPHIE radial velocities (Hara+, 2020)
The SOPHIE search for northern extrasolar planets. XVI.
HD 158259: A compact planetary system in a near-3:2 mean motion resonance chain.
Hara N.C., Bouchy F., Stalport M., Boisse I., Rodrigues J., Delisle J.-B.,
Santerne A., Henry G.W., Arnold L., Astudillo-Defru N., Borgniet S.,
Bonfils X., Bourrier V., Brugger B., Courcol B., Dalal S., Deleuil M.,
Delfosse X., Demangeon O., Diaz R.F., Dumusque X., Forveille T.,
Hebrard G., Hobson M.J., Kiefer F., Lopez T., Mignon L., Mousis O.,
Moutou C., Pepe F., Rey J., Santos N.C., Segransan D., Udry S., Wilson P.A.
<Astron. Astrophys., 636, L6 (2020)>
=2020A&A...636L...6H 2020A&A...636L...6H (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Stars, G-type ; Exoplanets ;
Radial velocities ; Photometry
Keywords: planets and satellites: detection -
planets and satellites: dynamical evolution and stability -
planets and satellites: fundamental parameters -
planets and satellites: formation - methods: statistical -
techniques: radial velocities
Abstract:
Since 2011, the SOPHIE spectrograph has been used to search for
Neptunes and super-Earths in the northern hemisphere. As part of this
observational program, 290 radial velocity measurements of the 6.4 V
magnitude star HD 158259 were obtained. Additionally, TESS photometric
measurements of this target are available. We present an analysis of
the SOPHIE data and compare our results with the output of the TESS
pipeline.
The radial velocity data, ancillary spectroscopic indices, and
ground-based photometric measurements were analyzed with classical and
l1 periodograms. The stellar activity was modeled as a correlated
Gaussian noise and its impact on the planet detection was measured
with a new technique.
The SOPHIE data support the detection of five planets, each with
msini~=6M⊕, orbiting HD 158259 in 3.4, 5.2, 7.9, 12, and 17.4
days. Though a planetary origin is strongly favored, the 17.4 d signal
is classified as a planet candidate due to a slightly lower
statistical significance and to its proximity to the expected stellar
rotation period. The data also present low frequency variations, most
likely originating from a magnetic cycle and instrument systematics.
Furthermore, the TESS pipeline reports a significant signal at 2.17
days corresponding to a planet of radius ~=1.2R⊕. A compatible
signal is seen in the radial velocities, which confirms the detection
of an additional planet and yields a ~=2M⊕ mass estimate.
We find a system of five planets and a strong candidate near a 3:2
mean motion resonance chain orbiting HD 158259. The planets are found
to be outside of the two and three body resonances.
Description:
Radial velocities of HD 158259 from SOPHIE spectrograph.
Objects:
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RA (2000) DE Designation(s)
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17 25 24.06 +52 47 26.5 HD 158259 = TOI-1462
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
hd158259.dat 89 290 HD 158259 SOPHIE OHP observations
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See also:
J/A+A/505/853 : HD16760 radial velocity curve (Bouchy+, 2009)
J/A+A/513/A69 : HD9446 radial velocity curve (Hebrard+, 2010)
J/A+A/523/A88 : A Jupiter-mass companion around HD 109246 (Boisse+, 2010)
J/A+A/538/A113 : RV of eight stars (Diaz+ 2012)
J/A+A/545/A55 : RV of 5 stars (Boisse+, 2012)
J/A+A/563/A22 : RV of 3 new hot Jupiters (Moutou+, 2014)
J/A+A/585/A46 : RV of 5 stars (Bouchy+, 2016)
J/A+A/588/A144 : RV of 15 targets (Wilson+, 2016)
J/A+A/588/A145 : RV of 8 stars with giant planets (Hebrard+, 2016)
J/A+A/601/A9 : HD17674, HD29021, and HD42012 radial velocities (Rey+, 2017)
J/A+A/618/A103 : Gl617A and Gl96 radial velocity curves (Hobson+, 2018)
J/A+A/625/A17 : SOPHIE data of Gliese 411 (Diaz+, 2019)
Byte-by-byte Description of file: hd158259.dat
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Bytes Format Units Label Explanations
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1- 10 F10.4 d RJD Reduced Julian date (JD-2400000)
12- 18 F7.4 km/s RV Radial velocity
20- 25 F6.4 km/s e_RV Radial velocity photon plus instrument error
27- 32 F6.4 km/s FWHM Full width half maximum of the CCF
34- 40 F7.4 --- Cont Contrast of the CCF
42- 48 F7.4 km/s BisSpan Bisector slope span of the CCF
50- 55 F6.4 km/s noise Photon noise
57- 62 F6.2 --- sn10 Signal to noise ratio on echelle order 10
64- 69 F6.2 --- sn50 Signal to noise ratio on echelle order 50
71- 76 F6.2 --- sn60 Signal to noise ratio on echelle order 60
78- 84 A7 --- RHK log R'HK
86- 89 F4.2 --- e_RHK Error on log R'HK
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Acknowledgements:
Nathan Hara, Nathan.Hara(at)unige.ch
Francois Bouchy, francois.bouchy(at)unige.ch
[University of Geneva, Switzerland]
Isabelle Boisse, Isabelle.boisse(at)lam.r
Alexandre Santerne, Alexandre. Santerne(at)lam.r
[Laboratoire d'astrophysique de Marseille, France]
References:
Bouchy et al., Paper I 2009A&A...505..853B 2009A&A...505..853B, Cat. J/A+A/505/853
Hebrard et al., Paper II 2010A&A...513A..69H 2010A&A...513A..69H, Cat. J/A+A/513/A69
Boisse et al., Paper III 2010A&A...523A..88B 2010A&A...523A..88B, Cat. J/A+A/535/A88
Diaz et al., Paper IV 2012A&A...538A.113D 2012A&A...538A.113D, Cat. J/A+A/538/A113
Boisse et al., Paper V 2012A&A...545A..55B 2012A&A...545A..55B, Cat. J/A+A/545/A55
Moutou et al., Paper VI 2014A&A...563A..22M 2014A&A...563A..22M, Cat. J/A+A/563/A22
Courcol et al., Paper VII 2015A&A...581A..38C 2015A&A...581A..38C
Bouchy et al., Paper VIII 2016A&A...585A..46B 2016A&A...585A..46B, Cat. J/A+A/585/A46
Wilson et al., Paper IX 2016A&A...588A.144W 2016A&A...588A.144W, Cat. J/A+A/588/A144
Hebrard et al., Paper X 2016A&A...588A.145H 2016A&A...588A.145H, Cat. J/A+A/588/A145
Diaz et al., Paper XI 2016A&A...591A.146D 2016A&A...591A.146D
Rey et al., Paper XII 2017A&A...601A...9R 2017A&A...601A...9R, Cat. J/A+A/601/A9
Hobson et al., Paper XIII 2018A&A...618A.103H 2018A&A...618A.103H, Cat. J/A+A/618/A03
Diaz et al., Paper XIV 2019A&A...625A..17D 2019A&A...625A..17D, Cat. J/A+A/625/A17
Hobson et al., Paper XV 2019A&A...625A..18H 2019A&A...625A..18H
(End) Patricia Vannier [CDS] 08-Feb-2021