J/A+A/569/A120ivo://CDS.VizieR/J/A+A/569/A120doi:10.26093/cds/vizier.35690120CDSLodieu N.Perez-Garrido A.Bejar V.J.S.Gauza B.Ruiz M.T.Rebolo R.,Pinfield D.J.Martin E.L.2017-06-21T08:21:57Z2014-10-02T07:52:40ZCDS support team

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

cds-question@unistra.frsurveyslate-type-starsspectroscopyWe present the results of a search for wide companions to planet-host stars to improve our knowledge on their multiplicity at wide physical separations. We cross-matched approximately 6200 square degree area of the Southern sky imaged by the Visible Infrared Survey Telescope for Astronomy (VISTA) Hemisphere Survey (VHS) with the Two Micron All Sky Survey (2MASS) to look for wide common proper motion companions to known planet-host stars. We complemented our astrometric search with photometric criteria. We confirmed spectroscopically the co-moving nature of seven sources out of 16 companion candidates and discarded eight, while the remaining one stays as a candidate. Among these new wide companions to planet-host stars, we discovered a T4.5 dwarf companion at 6.3-arcmin (~9000AU) from HIP70849, a K7V star which hosts a 9 Jupiter mass planet with an eccentric orbit. We also report two new stellar M dwarf companions to one G and one metal-rich K star. We infer stellar and substellar binary frequencies for our complete sample of 37 targets of 5.4+/-3.8% and 2.7+/-2.7% (1 sigma confidence level), respectively, for projected physical separations larger than ~60-160AU assuming the range of distances of planet-host stars (24-75pc). These values are comparable to the frequencies of non planet-host stars. We find that the period-eccentricity trend holds with a lack of multiple systems with planets at large eccentricities (e>0.2) for periods less than 40-days. However, the lack of planets more massive than 2.5 Jupiter masses and short periods (<40-days) orbiting single stars is not so obvious due to recent discoveries by ground-based transit surveys and space missions.2014A&A...569A.120Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/569/A120CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/569/A120https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/569/A120http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/569/A120https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/569/A120https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/569/A120http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/569/A120GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/569/A120/list (List of studied wide companions to planet-host stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/569/A120/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/569/A120/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/569/A120/list?GETtext/xml+votable180.050000true216.6905833-5.17247220.0055555555555555566/18690 25875 26706 42319 42340 42570 42592 43336 43671 43677 46297 46306 483911.5062136169708525e-19 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/569/A120?format=asciiOpticaldefaultJ/A+A/569/A120/listList of studied wide companions to planet-host starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameAssociated planet-host star name (from table1 of the paper)meta.id;meta.maincharspShow the spectrummeta.ref.urlcharFileNameName of the spectrum file in subdirectory spmeta.id;meta.filecharRAJ2000Wide companion right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Wide companion declination (J2000)pos.eq.dec;meta.mainJmagWide companion 2MASS J magnitudemagphot.mag;em.IR.JfloatSpTypeWide companion MK spectral typesrc.spTypechar