J/AJ/158/190ivo://CDS.VizieR/J/AJ/158/190doi:10.26093/cds/vizier.51580190CDSHamer J.H.Schlaufman K.C.2020-04-16T12:53:59Z2020-01-14T12:05:01ZCDS support team

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

cds-question@unistra.frexoplanetsWhile cooler giant planets are often observed with nonzero eccentricities, the short-period circular orbits of hot Jupiters suggest that they lose orbital energy and angular momentum due to tidal interactions with their host stars. However, orbital decay has never been unambiguously observed. We use data from Gaia Data Release 2 (Cat. I/345) to show that hot Jupiter host stars have a smaller Galactic velocity dispersion than a similar population of stars without hot Jupiters. Since Galactic velocity dispersion is correlated with age, this observation implies that the population of hot Jupiter host stars is on average younger than the field population. The best explanation for this inference is that tidal interactions cause hot Jupiters to inspiral while their host stars are on the main sequence. This observation requires that the typical modified stellar tidal quality factor Q_*_^'^ for solar-type stars is in the range log_10_Q_*_^'^~<7.2019AJ....158..190Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/158/190CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)J/ApJ/757/18 : Radial velocities for 16 hot Jupiter host starsJ/ApJ/788/39 : Hot Jupiter exoplanets host stars EW and abundanceshttp://exoplanetarchive.ipac.caltech.edu/ : NASA Exoplanet Archivehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/158/190https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/158/190http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/158/190https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/158/190https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/158/190http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/158/190GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/158/190/table1 (Main sequence hot Jupiter hosts with good astrometry)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/158/190/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/158/190/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/158/190/table1?GETtext/xml+votable180.050000true307.859805839.93882360.0055555555555555566/267 431 437 790 876 1066 1292 2250 2297 2308 2335 2472 2551 2584 2596 2711 2715 2740 2953 3344 4145 4272 4298 4632 4698 4699 4990 5170 5475 6017 6058 6181 6349 6381 6539 6638 7036 7502 7746 7917 8197 8237 8825 8843 9173 9355 9459 9482 9524 9811 10118 10407 10654 10701 10730 10953 11279 11455 11699 12342 12424 12486 12853 12862 12983 13044 13439 13569 13680 13702 13941 14446 14548 14567 14582 14583 14586 14587 14591 14598 14667 14735 14762 14764 14772 14779 14781 14816 14825 14826 14828 14886 14914 14929 14961 14971 14973 14993 15029 15040 15104 15109 15112 15122 15129 15143 15145 15153 15160 15162 15169 15170 15218 15345 15550 15950 16405 16432 16512 16534 16633 16947 17040 17226 17227 17344 17753 17851 17865 17954 18093 18208 18452 18510 18766 18821 18880 18943 20116 20145 20186 20339 20382 20476 20501 20565 20648 20659 20741 20780 20790 20872 21026 21079 21176 21254 21876 21989 22001 22034 22040 22065 22078 22120 22169 22208 22252 22331 22396 22505 22519 22816 23636 24039 24057 24122 24409 24428 24622 24752 24815 24858 24981 25132 25140 25153 25194 25401 25427 25593 25604 25721 25885 25950 26019 26706 26844 26918 26997 27488 28433 29513 29683 30009 30013 30157 30240 30293 30436 30444 30451 30466 30485 30801 31641 31858 32217 32564 32640 32659 32727 32749 33157 33200 33220 33283 33719 33798 34260 34370 34471 34526 34708 34755 34812 34847 34848 34860 34898 34957 35210 35456 36142 36165 36196 36497 36667 37018 37461 38233 38452 38545 38682 39007 39257 39474 39487 39512 39542 39667 39673 39812 39826 39829 39851 40014 40022 40189 40194 40320 40862 40864 41578 42001 42333 42510 42936 42989 43248 43336 43586 43623 43625 43677 43775 43847 43865 43960 44200 44672 44685 45051 45168 45380 45766 45800 45922 46058 46316 46421 46429 46437 47000 47167 47186 47307 47330 47476 47681 48005 48076 48082 48117 48165 48178 48338 48353 48358 48364 48674 48727 48747 48803 48945 49103https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/158/190?format=asciidefaultJ/AJ/158/190/table1Main sequence hot Jupiter hosts with good astrometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintArchiveNameNASA Exoplanet Archive name of hot Jupiter hostmeta.id;meta.maincharSimbadNameCorresponding SIMBAD host namemeta.idcharSimbadSimbad 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