J/A+A/685/A143ivo://CDS.VizieR/J/A+A/685/A143doi:10.26093/cds/vizier.36850143CDSMamonova E.Shan Y.Hatalova P.Werner S.C.2024-11-29T20:02:17Z2024-05-17T19:29:03ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsstellar-massesstellar-radiiorbitsThe number of discovered exoplanets now exceeds 5500, allowing statistical analyses of planetary systems. Multi-planet systems are mini-laboratories of planet formation and evolution, and analysing their system architectures can help us to constrain the physics of these processes. Recent works have found evidence of significant intrasystem uniformity in planet properties such as radius, mass, and orbital spacing, collectively termed `peas in a pod' trends. In particular, correlations in radius and mass have been interpreted as implying uniformity in planet bulk density and composition within a system. However, the samples used to assess trends in mass tend to be small and biased. In this paper, we re-evaluate correlations in planet properties in a large sample of systems with at least two planets for which mass and radius have been directly measured, and therefore bulk density can be calculated. Our sample was assembled using the most up-to-date exoplanet catalogue data, and we compute the relevant statistics while using a procedure to 'weight' the data points according to measurement precision. We find a moderate correlation in radius and a weak correlation in the densities of adjacent planets. However, masses of neighbouring planets show no overall correlation in our main sample and a weak correlation among pairs of planets similar in size or pairs restricted to M_p_<100M_{Earth}_, R_p_<10R_{Earth}_. Similarly, we show that the intrasystem dispersion in radius is typically less than that in mass and density. We identify ranges in stellar host properties that correlate with stronger uniformity in pairs of adjacent planets: low T_{eff} for planet masses, and low metallicity and old age for planet densities. Furthermore, we explore whether peas in a pod trends extend into planet compositions or interior structures. For small neighbouring planets with similar radii, we show that their masses and interior structures are often disparate, indicating that even within the same system, similarity in radii is not necessarily a good proxy for similarity in composition or the physical nature of the planets.2024A&A...685A.143Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/685/A143CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/685/A143https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/685/A143http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/685/A143https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/685/A143https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/685/A143http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/685/A143GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/685/A143/catalog (The main planets parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/685/A143/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/685/A143/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/685/A143/catalog?GETtext/xml+votable180.050000true311.2897186-31.34089940.0055555555555555565/3734 3742 6/1032 1052 4698 7487 11724 11737 11923 14278 14579 14582 14584 14586-14587 14591 14731 14733-14735 14744 14750-14751 14753 14756-14757 14762-14764 14767-14768 14774 14779 14781-14782 14792 14794 14818-14819 14824-14826 14919-14920 14923-14925 14929-14931 14933 14935 14952 14958-14960 14963 14966 14973 15060 15104-15105 15107 15109-15110 15115-15116 15118 15120-15121 15123 15126-15127 15131 15134 15137 15139 15141 15146 15149-15150 15154-15155 15158 15160 15169-15172 15174 15973 16014 16472 16847 17149 18147 18350 18569 18726 18785-18786 18881 20125 20667 21137 21206 22065 22351 23867 24587 25463 25725 25797 26278 26768 26977 26992 27085 27358 27393 27411 29349 32433 33145 33169 33210 33212 33386 33972 34561 36015 36614 37453 37548 40833 41666 41941 42986 43336 43415 43631 44317 44431 44436 44463 44474 47488 48274https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/685/A143?format=asciidefaultJ/A+A/685/A143/catalogThe main planets parametersSimbadNameSimbad column added by the CDSmeta.idcharnullableStarStar namemeta.id.parentcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPlanetPlanet namemeta.id;meta.maincharl_MassIndicator of lower (>) or upper (<) limit for mass valuemeta.code.error;phys.masscharMass[0/14]? Planet mass(1.898187x10+27kg)phys.massdoublenullablee_Mass? Planet mass min error(1.898187x10+27kg)stat.error;phys.massfloatnullableE_Mass? Planet mass max error(1.898187x10+27kg)stat.error;stat.maxfloatnullableRefReferences, in refs.dat filemeta.ref;meta.filecharf_MassMass detection type (I, RV, T, TTV)meta.codecharl_RadiusIndicator of lower (>) or upper (<) limit for radius valuemeta.code.error;phys.size.radiuscharRadius[0.02/3.45]? Planet radius(7.1492x10+7m)phys.size.radiusfloatnullablee_Radius? Planet radius min error(7.1492x10+7m)stat.error;phys.size.radiusfloatnullableE_Radius? Planet radius max error(7.1492x10+7m)stat.error;stat.maxdoublenullableamaj[0/320]? Planet semi-major axisAUphys.angSize;srcdoublenullablee_amaj? Planet semi-major axis min errorAUstat.errorfloatnullableE_amaj? Planet semi-major axis max errorAUstat.error;stat.maxdoublenullablePeriod[0.24/171667.5]? Planet perioddtime.perioddoublenullablee_Period? Planet period min errordstat.error;time.perioddoublenullableE_Period? Planet period max errordstat.error;stat.maxdoublenullable_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/A+A/685/A143/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.notecharBibCodebibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorchar