J/ApJS/250/29ivo://CDS.VizieR/J/ApJS/250/29doi:10.26093/cds/vizier.22500029CDSFeng F.Shectman S.A.Clement M.S.Vogt S.S.Tuomi M.Teske J.K.,Burt J.Crane J.D.Holden B.Wang S.X.Thompson I.B.Diaz M.R.,Butler R.P.2021-09-09T09:37:19Z2020-11-27T12:30:44ZCDS support team

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

cds-question@unistra.frm-starsradial-velocityvisible-astronomyspectroscopyEarth-sized planets in the habitable zones of M dwarfs are good candidates for the study of habitability and detection of biosignatures. To search for these planets, we analyze all available radial velocity data and apply four signal detection criteria to select the optimal candidates. We find 10 strong candidates satisfying these criteria and three weak candidates showing inconsistency over time due to data samplings. We also confirm three previous planet candidates and improve their orbital solutions through combined analyses of updated data sets. Among the strong planet candidates, HIP38594b is a temperate super-Earth with a mass of 8.2+/-1.7M_{Earth}_ and an orbital period of 60.7+/-0.1 days, orbiting around an early-type M dwarf. Early-type M dwarfs are less active and thus are better hosts for habitable planets than mid-type and late-type M dwarfs. Moreover, we report the detection of five two-planet systems, including two systems made up of a warm or cold Neptune and a cold Jupiter, consistent with a positive correlation between these two types of planets. We also detect three temperate Neptunes, four cold Neptunes, and four cold Jupiters, contributing to a rarely explored planet population. Due to their proximity to the Sun, these planets on wide orbits are appropriate targets for direct imaging by future facilities such as the Habitable Exoplanet Observatory and the Extremely Large Telescope.2020ApJS..250...29Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/250/29CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)J/ApJ/646/505 : Catalog of nearby exoplanets (Butler+, 2006)J/A+A/523/A48 : Gaia photometry (Jordi+, 2010)J/ApJ/812/3 : MEarth mid-to-late M dwarfs kinematics (West+, 2015)J/A+A/600/A13 : HARPS M dwarf magnetic activity (Astudillo-Defru+, 2017)J/AJ/153/208 : LCES HIRES/Keck RV Exoplanet Survey (Butler+, 2017)J/AJ/156/276 : Exoplanet atmospheric data with MIRI (Danielski+, 2018)J/AJ/155/39 : Variability data of TIC stars with KELT (Oelkers+, 2018)J/other/Nat/563.365 : Barnard's star radial velocity curve (Ribas+, 2018)J/A+A/616/A7 : Gaia DR2 RV standard stars cat. (Soubiran+, 2018)J/AJ/157/52 : RV obs. in super-Earth systems (Bryan+, 2019)J/MNRAS/484/L8 : Systematic errors for HIRES/Keck RVs (Tal-Or+, 2019)J/A+A/627/A49 : Teegarden's Star RV & H{alpha} (Zechmeister+, 2019)J/A+A/636/A74 : HARPS radial velocity database (Trifonov+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/250/29https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/250/29http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/250/29https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/250/29https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/250/29http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/250/29GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/250/29/table1 (Stellar parameters and radial velocity (RV) data sets)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/250/29/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/250/29/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/250/29/table1?GETtext/xml+votable180.050000true108.0200372-24.89208110.0055555555555555566/546 7471 11636 17572 25009 27912 39807 39912 40513 44728 46699https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/250/29?format=asciiOpticaldefaultJ/ApJS/250/29/table1Stellar parameters and radial velocity (RV) data setsNameMain name of the starmeta.id;meta.maincharprimarySpTSIMBAD spectral typesrc.spTypecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintONameOther namemeta.idcharMass[0.15/0.63] Stellar mass from TESS Input Catalog (TIC; Stassun+, 2019, IV/38)solMassphys.massfloate_Mass[0.02/0.08] Mass uncertaintysolMassstat.error;phys.massfloatPlx[35.13/223.63] Gaia DR2 parallaxmaspos.parallaxfloate_Plx[0.03/0.11] Parallax uncertaintymasstat.error;pos.parallaxfloatVmag[8.9/12.5] V magnitude (1)magphot.mag;em.opt.VfloatAPF[0/149] Number of RVs from APFmeta.numberintH1[0/84] Number of RVs from "HARPSpre" (before the fiber change for HARPS in 2015)meta.numberintH2[0/48] Number of RVs from "HARPSpost" (after the fiber change for HARPS in 2015)meta.numberintKeck[0/147] Number of RVs from Keckmeta.numberintPFS[0/55] Number of RVs from PSFmeta.numberintSoph[0/12] Number of RVs from SOPHIEmeta.numberintNrvNumber of RV measurements for this star (link to Table 2)meta.numberintnullableVPVelocity Plotmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/ApJS/250/29/table2RV data setsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharBJDBarycentric Julian Datedtime.epochdoubleRV[-106.5/97.6] Barycenter corrected radial velocitym/sphys.veloc;pos.barycenterdoublee_RV[0.8/7.2] Uncertainty in RVm/sstat.errorfloatInstInstrument (1)meta.id;instrchar