J/A+A/610/A3ivo://CDS.VizieR/J/A+A/610/A3doi:10.26093/cds/vizier.36100003CDSJeong G.Lee B.-C.Han I.Omiya M.Izumiura H.Sato B.Harakawa H.,Kambe E.Mkrtichian D.2018-03-12T09:03:00Z2018-02-07T08:55:02ZCDS support team

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

cds-question@unistra.frgiant-starsradial-velocityThe purpose of this paper is to detect and investigate the nature of long-term radial velocity (RV) variations of K-type giants and to confirm planetary companions around the stars. We have conducted two planet search programs by precise RV measurement using the 1.8m telescope at Bohyunsan Optical Astronomy Observatory (BOAO) and the 1.88m telescope at Okayama Astrophysical Observatory (OAO). The BOAO program searches for planets around 55 early K giants. The OAO program is looking for 190 G-K type giants. In this paper, we report the detection of long-period RV variations of three K giant stars, HD 40956, HD 111591, and HD 113996. We investigated the cause of the observed RV variations and conclude the substellar companions are most likely the cause of the RV variations. The orbital analyses yield P=578.6+/-3.3d, msini=2.7+/-0.6M_J_, a=1.4+/-0.1AU for HD 40956; P=1056.4+/-14.3d, msini=4.4+/-0.4M_J_, a=2.5+/-0.1AU for HD 111591; P=610.2+/-3.8d, msini=6.3+/-1.0M_J_, a=1.6+/-0.1AU for HD 113996.2018A&A...610A...3Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/610/A3CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/610/A3https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/610/A3http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/610/A3https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/610/A3https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/610/A3http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/610/A3GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/610/A3/stars (Studied stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/610/A3/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/610/A3/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/610/A3/stars?GETtext/xml+votable180.050000true91.66312563.45383330.0055555555555555566/7162 10380 28103https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/610/A3?format=asciidefaultJ/A+A/610/A3/starsStudied starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHDHenry Draper catalogue star numbermeta.id;meta.mainintRAJ2000Simbad Right Ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Simbad Declination (J2000.0)pos.eq.dec;meta.mainBmagSimbad B band magnitudemagphot.mag;em.opt.BfloatVmagSimbad V band magnitudemagphot.mag;em.opt.VfloatSpTypeSimbad MK spectral typesrc.spTypecharPerPerioddtime.periodfloate_Perrms uncertainty on Perdstat.errorfloatmsiniMinimum ass of orbiting companion(1.898187x10+27kg)phys.massfloate_msinirms uncertainty on msini(1.898187x10+27kg)stat.errorfloataSemi-major axis of orbiting companionAUphys.size.smajAxisfloate_arms uncertainty on aAUstat.errorfloatVCShow the Radial Velocity curvesmeta.ref.urlcharJ/A+A/610/A3/rvdatIndividual rotation velocity datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHDHenry Draper catalogue star numbermeta.id;meta.mainintJDJulian day (JD-2450000)dtime.epochdoubleRVRadial velocitym/sphys.veloc;pos.heliocentricfloate_RVError of radial velocitym/sstat.errorfloatObsObservatorymeta.id;instr.obstycharInstSpectrographmeta.id;instrchar