J/A+A/700/A222ivo://CDS.VizieR/J/A+A/700/A222doi:10.26093/cds/vizier/bc-nw/lcccCDSCarmona A.Delfosse X.Ould-Elhkim M.Cortes-Zuleta P.Hara N.C.,Artigau E.Moutou C.Petit A.C.Mignon L.Donati J.F.Cook N.J.,Gagne J.Forveille T.Diaz R.F.Martioli E.Arnold L.Cadieux C.,Boisse I.Morin J.Petit P.Fouque P.Bonfils X.Hebrard G.Acuna L.,do Nascimento J.-D.Jr.Cloutier R.Astudillo-Defru N.Bouchy F.,Bourrier V.Dalal S.Deleuil M.Doyon R.Dumusque X.Grouffal S.,Heidari N.Hoyer S.Larue P.Kiefer F.Santerne A.Segransan D.,Serrano Bell J.Stalport M.Sulis S.Udry S.Vivien H.G.2026-08-03T06:56:30Z2025-08-19T08:55:28ZCDS support team

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

cds-question@unistra.frmultiple-starsm-starsexoplanetsradial-velocityvisible-astronomyThe search for exoplanets around nearby M dwarfs represents a crucial milestone in the census of planetary systems in the vicinity of our Solar System. Since 2018 our team has been conducting a blind search program for planets around nearby M dwarfs with the near-IR spectro-polarimeter and velocimeter SPIRou at the Canada-France-Hawaii Telescope and with the optical velocimeter SOPHIE at the Haute-Provence Observatory in France. The aim of this paper is to present our results on Gl 410, a 0.55M_{sun}_ 480+/-150Myr old active M dwarf distant 12pc. We searched for planetary companions using radial velocities (RVs). We used the line-by-line (LBL) technique to measure the RVs with SPIRou and the template matching method with SOPHIE. Three different methods were employed, two based on principal component analysis (PCA), to clean the SPIRou RVs for systematics. We applied Gaussian processes (GP) modeling to correct the SOPHIE RVs for stellar activity. The l1 and apodized sine periodogram analysis was used to search for planetary signals in the SPIRou data taking into account activity indicators. We analyzed TESS data and searched for planetary transits. We report the detection of a Msin(i)=8.4+/-1.3M_{sun}_ sub-Neptune planet at a period of 6.020+/-0.004 days in circular orbit with SPIRou. The same signal, although with lower significance, was also retrieved in the SOPHIE RV data after correction for activity using a GP trained on SPIRou's longitudinal magnetic field (Bl) measurements. The TESS data indicate that the planet is not transiting. Within the SPIRou wPCA RVs, we find tentative evidence for two additional planetary signals at 2.99 and 18.7 days. Infrared RVs are a powerful method to detect extrasolar planets around active M dwarfs. Care should be taken, however, to correct or filter systematics generated by residuals of the telluric correction or small structures in the detector plane. The LBL technique combined with PCA offers a promising way to reach this objective. Further monitoring of Gl 410 is necessary.2025A&A...700A.222Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/700/A222CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/700/A222https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/700/A222http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/700/A222https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/700/A222https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/700/A222http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/700/A222GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/700/A222/table2SOPHIE RV measurements of Gl 410recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateDate in YYYY-MM-DD'Y:M:D'time.epochnullableRJDReduced Julian date (JD-2400000)dtime.epochdoubleRVRadial velocitykm/sphys.veloc;pos.heliocentricdoublee_RVError in RVkm/sstat.errorfloatdeltaRVRV minus median RVm/sphys.veloc;arith.difffloate_deltaRVError in deltaRVm/sstat.errorfloatJ/A+A/700/A222/table3SPIRou LBL and Wapiti RV measurements of Gl 410recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateDate in YYYY-MM-DD'Y:M:D'time.epochnullableRJDReduced Julian date (JD-2400000)dtime.epochdoubleVtotSystemic velocity - BERVkm/sphys.velocfloatRV-LBLLBL radial velocitykm/sphys.veloc;pos.heliocentricdoublee_RV-LBLError in the LBL RVkm/sstat.errorfloatdeltaRV-LBLLBL RV minus median LBL RVm/sphys.veloc;arith.difffloate_deltaRV-LBLError in delta LBL RVm/sstat.errorfloatRV-Wapiti? Wapiti radial velocitykm/sphys.veloc;pos.heliocentricdoublenullablee_RV-Wapiti? Error in the Wapiti RVkm/sstat.errorfloatnullabledeltaRV-Wapiti? Wapiti RV minus median Wapiti RVm/sphys.veloc;arith.difffloatnullablee_deltaRV-Wapiti? Error in delta Wapiti RVm/sstat.errorfloatnullableJ/A+A/700/A222/table5SPIRou LBL wPCA RV measurements of Gl 410recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDATEDate in YYYY-MM-DD'Y:M:D'time.epochnullableRJDReduced Julian datedtime.epochdoubleRV-WPCAWPCA LBL radial velocitykm/sphys.veloc;pos.heliocentricdoublee_RV-WPCAError in the WPCA LBL RVkm/sstat.errorfloatdeltaRV-WPCAWPCA LBL RV minus median WPCA LBL RVm/sphys.veloc;arith.difffloate_deltaRV-WPCAError in delta WPCA LBL RVm/sstat.errorfloatd2vLBL projection onto the 2nd derivative of the spectrumm**2.s**-2pos.cartesiandoublee_d2vError in d2vm**2.s**-2stat.errorfloatd3vLBL projection onto the 3rd derivative of the spectrumm**3.s**-3pos.cartesiandoublee_d3vError in d3vm**3.s**-3stat.errordoubledLWLBL differential line widthm/sspect.line.width;arith.diffdoublee_dLWError in dWm/sstat.errorfloatdT4000LBL differential temperature with respect to a T=4000K templateKphot.antennaTemp;arith.difffloate_dT4000Error in dT4000Kstat.errorfloat