J/MNRAS/497/2250ivo://CDS.VizieR/J/MNRAS/497/2250doi:10.26093/cds/vizier.74972250CDSHwang H.-C.Hamer J.H.Zakamska N.L.Schlaufman K.C.2024-10-18T20:16:26Z2023-10-26T15:26:30ZCDS support team

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

cds-question@unistra.frmultiple-starseclipsing-binary-starsexoplanetsvisible-astronomyThere is an ongoing debate on whether hot Jupiter hosts are more likely to be found in wide binaries with separations of ~100AU. In this paper, we search for comoving, very wide companions with separations of 10^3^-10^4^AU for hot Jupiter hosts and main-sequence contact binaries in Gaia DR2, and compare the very wide companion fractions with their object-by-object-matched field star samples. We find that 11.9+/-2.5 per cent of hot Jupiter hosts and 14.1+/-1.0 per cent of contact binaries have companions at separations of 10^3^-10^4^AU. While the very wide companion fraction of hot Jupiter hosts is a factor of 1.9+/-0.5 larger than their matched field star sample, it is consistent, within ~1{sigma}, with that of matched field stars if the matching is only with field stars without close companions (within ~50AU) as is the case for hot Jupiter hosts. The very wide companion fraction of contact binaries is a factor of 3.1+/-0.5 larger than their matched field star sample, suggesting that the formation and evolution of contact binaries are either tied to or correlated with the presence of wide companions. In contrast, the weak enhancement of very wide companion fraction for hot Jupiter hosts implies that the formation of hot Jupiters is not as sensitive to those environment properties. Our results also hint that the occurrence rates of dual hot Jupiter hosts and dual contact binaries may be higher than the expected values from random pairing of field stars, which may be due to their underlying metallicity and age dependence.2020MNRAS.497.2250Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/497/2250CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)J/AJ/158/190 : Main sequence hot Jupiter hosts with good astrometryhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/497/2250https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/497/2250http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/497/2250https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/497/2250https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/497/2250http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/497/2250GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/497/2250/hjcat (Hot Jupiter hosts catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/497/2250/hjcat?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/497/2250/hjcat?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/497/2250/hjcat?GETtext/xml+votable180.050000true5.6187172-59.94256750.0055555555555555566/876 1066 2335 2711 3344 6006 6017 8197 8825 9173 9653 10730 11455 13702 14886 15950 16432 16512 18510 21079 21254 22001 24428 25604 26844 30466 30485 34860 36196 39007 39673 43180 48178 48747 48945https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/497/2250?format=asciiOpticaldefaultJ/MNRAS/497/2250/cbcatMain-sequence contact binaries catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR2Gaia DR2 source identifier of the contact binarymeta.id;meta.mainCompanionGaia ID of contact binary companionmeta.id.assocSepSeparation between componentsAUpos.angDistancedoubleSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/497/2250/hjcatHot Jupiter hosts catalogSepSeparation between componentsAUpos.angDistancedoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR2Gaia DR2 source identifier of the hot Jupiter hostmeta.id;meta.mainCompanionGaia ID of hot Jupiter host companionmeta.id.assocSimbadSimbad 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.main