J/MNRAS/539/307ivo://CDS.VizieR/J/MNRAS/539/307doi:10.26093/cds/vizier.75390307CDSAlqasim A.Hirano T.Hori Y.Kawata D.Livingston J.Howell S.B.,Lanza A.F.Mann A.W.Ziegler C.Briceno C.Beichman C.A.Ciardi D.R.,Strakhov I.A.Lund M.B.Law N.2025-08-05T20:11:26Z2025-04-09T06:42:03ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsstellar-agesmetallicitystellar-massesstellar-radiiEccentric giant planets are predicted to have acquired their eccentricity through two major mechanisms: the Kozai-Lidov effect or planet-planet scattering, but it is normally difficult to separate the two mechanisms and determine the true eccentricity origin for a given system. In this work, we focus on a sample of 92 transiting, long-period giant planets (TLGs) as part of an eccentricity distribution study for this planet population in order to understand their eccentricity origin. Using archival high-contrast imaging observations, public stellar catalogs, precise Gaia astrometry, and the NASA Exoplanet Archive database, we explored the eccentricity distribution correlation with different planet and host-star properties of our sample. We also homogeneously characterized the basic stellar properties for all 86 host-stars in our sample, including stellar age and metallicity. We found a correlation between eccentricity and stellar metallicity, where lower-metallicity stars ([Fe/H]<=0.1) did not host any planets beyond e>0.4, while higher-metallicity stars hosted planets across the entire eccentricity range. Interestingly, we found no correlation between the eccentricity distribution and the presence of stellar companions, indicating that planet-planet scattering is likely a more dominant mechanism than the Kozai-Lidov effect for TLGs. This is further supported by an anti-correlation trend found between planet multiplicity and eccentricity, as well as a lack of strong tidal dissipation effects for planets in our sample, which favor planet-planet scattering scenarios for the eccentricity origin.2025MNRAS.539..307Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/539/307CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/539/307https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/539/307http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/539/307https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/539/307https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/539/307http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/539/307GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/539/307/nexa_st (Stellar parameters of our sample, extracted from the NASA Exoplanet Archive)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/539/307/nexa_st?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/539/307/nexa_st?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/539/307/nexa_st?GETtext/xml+votable180.050000true277.9436356.65067890.0055555555555555566/1275 2056 3732 3876 4280 4624 5266 7240 7898 7934 9550 11631 11737 13143 13269 14246 14579 14608 14733 14757 14763 14780 14920 14924 14935 14945 15109-15110 15141 15149 15158 15174 15178 15182 15284 16258 16347 16971 17434 18707 20904 21206 23747 24205 25699 25725 26278 26991-26992 27056 27358 27548 29022 30295 30450 32433 32757 32978 33210 33386 33449 33507 33592 33723 33814 33840 33875 34268 34890 35870 36086 36220 36312 37751 37947 38067 38946 38982 39549 40668 42986 43029 43541 44335 44474 45780https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/539/307?format=asciidefaultJ/MNRAS/539/307/nexa_plPlanet parameters of our sample, extracted from the NASA Exoplanet ArchiverecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTICName of the star as given by the TESS Input Catalog (TIC) (tic_id)meta.id;meta.mainlongPlanetPlanet name most commonly used in the literature (pl_name)meta.id.assoccharPerPlPlanet period (period)dtime.perioddoublee_PerPlPlanet period error (period_err)dstat.errordoubleRadPlPlanet radius (in Earth radius units) (r_earth)(6.3781x10+6m)phys.angSize;srcfloate_RadPlPlanet radius error (in Earth radius units) (r_earth_err)(6.3781x10+6m)stat.errorfloatMassPlPlanet mass (in Earth mass units) (m_earth)(5.97236x10+24kg)phys.massfloate_MassPlPlanet mass error (in Earth mass units) (m_earth_err)(5.97236x10+24kg)stat.errorfloateccPlPlanet eccentricity (ecc)src.orbital.eccentricityfloate_eccPlPlanet eccentricity error (ecc_err)stat.errorfloatNplNumber of confirmed planets in the planetary system (num_planets)meta.numberintJ/MNRAS/539/307/nexa_stStellar parameters of our sample, extracted from the NASA Exoplanet ArchiveSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTICName of the star as given by the TESS Input Catalog (TIC) (tic_id)meta.id;meta.mainlongHostnameHost star name most commonly used in the literature (hostname)meta.idcharAgeHost star age (nexa_age)Gyrmeta.idchare_AgeHost star age error (nexa_age_err)Gyrstat.error;time.agechar[Fe/H]Host star metallicity [Fe/H] (metallicity)meta.idfloate_[Fe/H]Host star metallicity [Fe/H] error (metallicity_err)stat.error;phys.abund.FefloatTeffHost star effective temperature (teff_star)Kmeta.idinte_TeffHost star effective temperature error (teff_star_err)Kstat.error;phys.temperature.effectiveintKmagBrightness of the host star as measured using the K (2MASS) band (Kmag)magphot.mag;em.IR.Kfloate_KmagError of the brightness of the host star as measured using the K (2MASS) band (Kmag_err)magstat.error;phot.magfloat_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.mainJ/MNRAS/539/307/jaxstarStellar parameters of our sample, homogenously derived using jaxstarrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTICName of the star as given by the TESS Input Catalog (TIC) (tic_id)meta.id;meta.mainlongAgeHost star age (jaxstar_age)Gyrmeta.idfloate_AgeHost star age error (jaxstar_age_err)Gyrstat.error;time.agefloat[Fe/H]Host star metallicity [Fe/H] (jaxstar_feh)meta.idfloate_[Fe/H]Host star metallicity [Fe/H] error (jaxstar_feh_err)stat.error;phys.abund.FefloatMassHost star mass (jaxstar_mass)solMassmeta.idfloate_MassHost star mass error (jaxstar_mass_err)solMassstat.error;phys.massfloatRadHost star radius (jaxstar_radius)solRadphys.angSize;srcfloate_RadHost star radius error (jaxstar_radius_err)solRadstat.errorfloatTeffHost star effective temperature (jaxstar_teff)Kmeta.idinte_TeffHost star effective temperature error (jaxstar_teff_err)Kstat.error;phys.temperature.effectiveint