J/A+A/636/L6ivo://CDS.VizieR/J/A+A/636/L6doi:10.26093/cds/vizier.36369006CDSHara 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.2021-09-10T09:39:22Z2021-02-09T13:17:08ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frmultiple-starsg-starsexoplanetsradial-velocityphotometrySince 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 l_1_ 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_{Earth}_, 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_{Earth}_. A compatible signal is seen in the radial velocities, which confirms the detection of an additional planet and yields a ~=2M_{Earth}_ 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.2020A&A...636L...6Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/636/L6CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/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)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/636/L6https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/636/L6http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/636/L6https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/636/L6https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/636/L6http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/636/L6GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/636/L6/hd158259HD 158259 SOPHIE OHP observationsRHKlog R'HKphot.flux;arith.ratiocharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRJDReduced Julian date (JD-2400000)dtime.epochdoubleRVRadial velocitykm/sphys.veloc;pos.heliocentricfloate_RVRadial velocity photon plus instrument errorkm/sstat.errorfloatFWHMFull width half maximum of the CCFkm/sspect.line.widthfloatContContrast of the CCFstat.fit.paramfloatBisSpanBisector slope span of the CCFkm/sphys.velocfloatnoisePhoton noisekm/sinstr.det.noisefloatsn10Signal to noise ratio on echelle order 10stat.snrfloatsn50Signal to noise ratio on echelle order 50stat.snrfloatsn60Signal to noise ratio on echelle order 60stat.snrfloate_RHKError on log R'HKstat.errorfloat