J/ApJ/890/L31ivo://CDS.VizieR/J/ApJ/890/L31doi:10.26093/cds/vizier.18909031CDSLi G.Dai F.Becker J.2021-10-05T13:05:59Z2021-09-01T12:59:59ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsstellar-radiiUltra-short-period planets (USPs) provide important clues to planetary formation and migration. It was recently found that the mutual inclinations of the planetary systems are larger if the inner orbits are closer (<~5R_*_) and if the planetary period ratios are larger (P_2_/P_1_>~5). This suggests that the USPs experienced both inclination excitation and orbital shrinkage. Here we investigate the increase in the mutual inclination due to stellar oblateness. We find that the stellar oblateness (within ~1Gyr) is sufficient to enhance the mutual inclination to explain the observed signatures. This suggests that the USPs can migrate closer to the host star in a near coplanar configuration with their planetary companions (e.g., disk migration+tides or in situ+tides), before mutual inclination gets excited due to stellar oblateness.2020ApJ...890L..31Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/890/L31CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIV/34 : K2 Ecliptic Plane Input Catalog (EPIC) (Huber+, 2017)J/A+A/497/497 : Physical parameters from JHK flux (Gonzalez-Hernandez+, 2009)J/ApJ/700/302 : Relative photometry of XO-3 (Winn+, 2009)J/ApJ/757/112 : Stellar diameters. II. K and M-stars (Boyajian+, 2012)J/ApJ/775/L11 : Stellar rotation periods for KOIs (McQuillan+, 2013)J/ApJ/784/45 : Kepler's multiple planet candidates. III. (Rowe+, 2014)J/ApJ/787/47 : 106 Kepler ultra-short-period planets (Sanchis-Ojeda+, 2014)J/ApJ/822/86 : False positive prob. for Q1-Q17 DR24 KOIs (Morton+, 2016)J/ApJ/834/17 : Mass & radius of planets, moons, low mass stars (Chen+, 2017)J/ApJ/839/92 : Praesepe members with K2 light curve data (Rebull+, 2017)J/ApJS/229/30 : Revised properties of Q1-17 Kepler targets (Mathur+, 2017)J/AJ/156/264 : California-Kepler Survey. VII. Planet rad. gap (Fulton+, 2018)J/MNRAS/474/2094 : Inferring probabilistic stellar rot. periods (Angus+, 2018)J/ApJ/879/49 : Rotation periods for Gaia members of NGC 6811 (Curtis+, 2019)J/ApJ/879/100 : K2 rot. periods for Hyades & Praesepe members (Douglas+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/890/L31https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/890/L31http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/890/L31https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/890/L31https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/890/L31http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/890/L31GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/890/L31/table1 (Planetary system properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/890/L31/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/890/L31/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/890/L31/table1?GETtext/xml+votable180.050000true133.12233949.96273220.0055555555555555565/3706 6/4246 14579 14584-14586 14588 14753-14757 14759 14761 14763 14767-14768 14774 14777 14781-14782 14914 14924 14933-14934 14939 14941-14942 14945 14947-14948 14952-14953 14960 14962 14966 14974 15041 15044 15104 15107 15109-15110 15113 15118-15122 15125 15128 15134 15137 15141 15147 15154 15158 15168 15171 15174 18350 18786 25463https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/890/L31?format=asciidefaultJ/ApJ/890/L31/table1Planetary system propertiesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameObject identifiermeta.id;meta.mainchara/R*[2/17.7] Innermost planetary semi-major axis to stellar radius ratiophys.size;arith.ratiofloatE_a/R*[0.02/0.7] Upper uncertainty in a/R*stat.error;stat.maxfloate_a/R*[0.02/0.7] Lower uncertainty in a/R*stat.errorfloatdeltai[0.2/11.3] Planetary mutual inclinationdegsrc.orbital.inclinationfloatE_deltai[0.13/4.6] Upper uncertainty in deltaidegstat.error;stat.maxfloate_deltai[0.13/7.3] Lower uncertainty in deltaidegstat.errorfloatProt[5.3/42] Stellar rotation perioddtime.periodfloatE_Prot[0.1/6.5] Upper uncertainty in Protdstat.error;stat.maxfloate_Prot[0.1/22.1] Lower uncertainty in Protdstat.errorfloatJ2t[7.6e-9/6.2e-6] Current day J_2_ value (1)em.freq;arith.ratiodoubleE_J2t[3.5e-10/9.9e-6] Upper uncertainty in J2tstat.error;stat.maxdoublee_J2t[3.5e-10/1.2e-6] Lower uncertainty in J2tstat.errordoubleJ2req[1.7e-8/0.08] Minimum J_2_ value requiredem.freq;arith.ratio;stat.mindoubleKCatDisplay data from McQuillan+, 2013, J/ApJ/775/L11; Angus+, 2018, J/MNRAS/474/2094; Fulton+, 2018, J/AJ/156/264 and Mathur+, 2017, J/ApJS/229/30 within 3"meta.ref.urlintnullable_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