J/MNRAS/496/851ivo://CDS.VizieR/J/MNRAS/496/851doi:10.26093/cds/vizier.74960851CDSWittenmyer R.A.Clark J.T.Sharma S.Stello D.Horner J.Kane S.R.,Stevens C.P.Wright D.J.Spina L.Cotar K.Asplund M.,Bland-Hawthorn J.Buder S.Casey A.R.De Silva G.M.D'Orazi V.,Freeman K.Kos J.Lewis G.Lin J.Lind K.Martell S.L.Simpson J.D.,Zucker D.B.Zwitter T.2025-02-20T20:16:03Z2023-09-28T14:09:41ZCDS support team

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

cds-question@unistra.frexoplanetseffective-temperaturestellar-massesstellar-radiivisible-astronomyspectroscopyAccurate and precise radius estimates of transiting exoplanets are critical for understanding their compositions and formation mechanisms. To know the planet, we must know the host star in as much detail as possible. We present complete results for planet-candidate hosts from the K2-HERMES survey, which uses the HERMES multi-object spectrograph on the Anglo-Australian Telescope to obtain R~28000 spectra for more than 30000 K2 stars. We present complete host-star parameters and planet-candidate radii for 224 K2 candidate planets from C1-C13. Our results cast severe doubt on 30 K2 candidates, as we derive unphysically large radii, larger than 2R_Jup_. This work highlights the importance of obtaining accurate, precise, and self-consistent stellar parameters for ongoing large planet search programs - something that will only become more important in the coming years, as TESS begins to deliver its own harvest of exoplanets.2020MNRAS.496..851Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/496/851CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIV/34 : K2 Ecliptic Plane Input Catalog (EPIC) (Huber+, 2017)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)I/345 : Gaia DR2 (Gaia Collaboration, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/496/851https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/496/851http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/496/851https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/496/851https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/496/851http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/496/851GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/496/851/table1 (Stellar parameters derived from seismology, and comparison with the spectroscopic results from K2-HERMES)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/496/851/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/496/851/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/496/851/table1?GETtext/xml+votable180.050000true174.31450860.78314750.005555555555555556Cone search capability for table J/MNRAS/496/851/table2 (Spectroscopic and derived stellar parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/496/851/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/496/851/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/496/851/table2?GETtext/xml+votable180.050000true182.700205-6.29421080.005555555555555556Cone search capability for table J/MNRAS/496/851/table3 (Planetary insolation and Habitable Zone boundaries)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/496/851/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/496/851/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/496/851/table3?GETtext/xml+votable180.050000true182.700205-6.29421060.005555555555555556Cone search capability for table J/MNRAS/496/851/table4 (Planet-candidate properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/496/851/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/496/851/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/496/851/table4?GETtext/xml+votable180.050000true182.700205-6.29421080.005555555555555556Cone search capability for table J/MNRAS/496/851/table5 (Candidates larger than 22R_{Earth}_. These candidates are highly likely to be false positives)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/496/851/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/496/851/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/496/851/table5?GETtext/xml+votable180.050000true174.9977819-5.04024220.0055555555555555566/270 285 287 311 313 340 353 378 397 402 406 450 467 4252-4253 4255 4268-4269 4273 4285 4313 4330 4345-4346 4521 4623 4632 4659 4675 4682 4688 4698-4699 4704 4708 4716 4720 4729-4733 4817 17999 18003 18012 18018 18114 18118 18130 18139 18142 18148 18163 18188 18224 18345 18347 18350 18438 18448 18459 18474 18481 18490 18496 18533 18560 18569 18571-18573 18588 18621 18630 18636 18643 23486 23523 24205 24210 25427 25433 25446 25454 25551-25552 25554 25560 25577-25578 25604 25608 25625 25627 25633 25644 25646 25655 25673 25683 25686 25689 25697-25698 25708 25710 25725 25747 25756 25793 25829 26254 26258 26932 26959 26975 26985 26990 26992 27025 27076 27120 27680 27690 27693 27704 27777 27787-27788 28941 28943 28946 28954 28976 28979 28981 29033-29034 29045 29047 29312 29349 29351 29730 30752 42874 42879 42910 42929 42948 42965 42978 42984 42986 44307 44317 44367 44377-44378 44404 44771 48028-48029 48121 48501 48503 48597https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/496/851?format=asciiOpticaldefaultJ/MNRAS/496/851/table1Stellar parameters derived from seismology, and comparison with the spectroscopic results from K2-HERMESEPICEPIC identifiermeta.id;meta.mainlongrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSimbadSimbad column added by the CDSmeta.ref.urlcharloggKSurface gravity derived from K2-HERMES spectroscopylog(cm.s**-2)phys.gravityfloate_loggKError on loggKlog(cm.s**-2)stat.errorfloatRadKStar radius derived from K2-HERMES spectroscopysolRadphys.size.radiusfloate_RadKError on RadKsolRadstat.errorfloatloggsSurface gravity derived from seismologylog(cm.s**-2)phys.gravityfloate_loggsError on loggslog(cm.s**-2)stat.errorfloatRadsStar radius derived from seismologysolRadphys.size.radiusfloate_RadsError on RadssolRadstat.errorfloatMasssMass radius derived from seismologysolMassphys.massfloate_MasssError on MassssolMassstat.errorfloatMassKMass radius derived from K2-HERMES spectroscopysolMassphys.massfloate_MassKError on MassKsolMassstat.errorfloat_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/496/851/table2Spectroscopic and derived stellar parametersSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEPICEPIC identifiermeta.id;meta.mainlongTeffEffective temperatureKphys.temperature.effectivefloate_TeffError on TeffKstat.error;phys.temperature.effectivefloatloggSurface gravitylog(cm.s**-2)phys.gravityfloate_loggError on logglog(cm.s**-2)stat.errorfloat[Fe/H]Fe/H abundance ratiophys.abund.Fe;arith.ratiofloate_[Fe/H]Error on [Fe/H]stat.error;phys.abund.FefloatMassStar masssolMassphys.massfloate_MassError on MasssolMassstat.error;phys.massfloatRadRadius masssolRadphys.massfloate_RadError on RadsolRadstat.errorfloat_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/496/851/table3Planetary insolation and Habitable Zone boundariesSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEPICEPIC identifiermeta.id;meta.maindoubleFluxIncident flux received by the planet in units of the solar constantSunphot.flux.density;em.optdoubleTeqhdEquilibrium temperature using 'hot dayside' modelKphys.temperaturefloatTeqwmEquilibrium temperature using 'well-mixed' modelKphys.temperaturefloatHZioHabitable Zone inner optimistic boundary (1)AUphys.size.radiusfloatHZicHabitable Zone inner conservative boundary (1)AUphys.size.radiusfloatHZocHabitable Zone outer optimistic boundary (1)AUphys.size.radiusfloatHZooHabitable Zone outer conservative boundary (1)AUphys.size.radiusfloat_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/496/851/table4Planet-candidate propertiesE_Rp/R*? Upper error on Rp/R*stat.error;stat.maxdoublenullableSimbadNameSimbad column added by the CDSmeta.idcharnullablee_Rp/R*? Lower error on Rp/R*stat.errordoublenullableRpPlanet radius (3)(6.3781x10+6m)phys.size.radiusfloate_RpError on Rp(6.3781x10+6m)stat.errorfloat_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.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEPICEPIC identifiermeta.id;meta.maincharK2K2 identifiermeta.idcharRef[1/13] Reference (1)meta.ref;pos.frameintPOrbital period from the NASA Exoplanet Archivedtime.perioddoublee_P? Error on Pdstat.errordoublenullableaSemimajor axis (2)AUphys.size.smajAxisdoublee_aError on aAUstat.errordoubleRp/R*Planet radius to star radius ratio from the NASA Exoplanet Archivephys.size;arith.ratiodoubleJ/MNRAS/496/851/table5Candidates larger than 22R_{Earth}_. These candidates are highly likely to be false positivesCommentsCommentsmeta.notecharSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEPICEPIC identifiermeta.id;meta.mainlongRpPlanet radius(6.3781x10+6m)phys.size.radiusfloate_RpError on Rp(6.3781x10+6m)stat.errorfloat_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