J/A+A/546/A5ivo://CDS.VizieR/J/A+A/546/A5doi:10.26093/cds/vizier.35460005CDSLee B.-C.Han I.Park M.-G.Mkrtichian D.E.Kim K.-M.2017-07-05T07:00:12Z2012-09-27T08:58:22ZCDS support team

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

cds-question@unistra.frmultiple-starssolar-system-planetsradial-velocityOur aim is to search for and study the origin of the low-amplitude and long-periodic radial velocity (RV) variations in K giants. We present high-resolution RV measurements of K2 giant epsilon CrB from February 2005 to January 2012 using the fiber-fed Bohyunsan Observatory Echelle Spectrograph (BOES) at the Bohyunsan Optical Astronomy Observatory (BOAO). We find that the RV measurements for epsilon CrB exhibit a periodic variation of 417.9+/-0.5days with a semi-amplitude of 129.4+/-2.0m/s. There is no correlation between RV measurements and chromospheric activity in the Ca II H region, the Hipparcos photometry, or bisector velocity span. Keplerian motion is the most likely explanation, with the RV variations arising from an orbital motion. Assuming a possible stellar mass of 1.7+/-0.1M_{sun}_ for epsilon CrB, we obtain a minimum mass for the planetary companion of 6.7+/-0.3M_Jup_ with an orbital semi-major axis of 1.3AU and eccentricity of 0.11. We also discuss the implications of our observations for stellar metallicity versus planet occurrence rate and stellar mass versus planetary mass relations.2012A&A...546A...5Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/546/A5CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/546/A5https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/546/A5http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/546/A5https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/546/A5https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/546/A5http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/546/A5GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/546/A5/table1Radial velocity of eps Corona BorealisrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian date of the observationtime.epochdoubleRVRadial velocitym/sphys.veloc;pos.heliocentricfloate_RVStandard error of RVm/sstat.errorfloat