J/A+A/647/A49ivo://CDS.VizieR/J/A+A/647/A49doi:10.26093/cds/vizier.36470049CDSSaffe C.Miquelarena P.Alacoria J.Flores M.Jaque Arancibia M.,Calvo D.Martin Girardi G.Grosso M.Collado A.2021-09-10T14:55:58Z2021-03-09T08:19:02ZCDS support team

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

cds-question@unistra.frmultiple-starsearly-type-starsexoplanetschemical-abundancesWe performed a detailed abundance determination in a sample of early-type stars with and without planets via spectral synthesis, searching for a likely relation between lambda Bootis stars and the presence of planets. We found no unique chemical pattern for the group of early-type stars bearing giant planets. However, our results support, in principle, a suggested scenario in which giant planets orbiting pre-main-sequence stars possibly block the dust of the disk and result in a lambda Bootis-like pattern. On the other hand, we do not find a lambda Bootis pattern in different hot-Jupiter planet host stars, which does not support the idea of possible accretion from the winds of hot-Jupiters, recently proposed in the literature. As a result, other mechanisms should account for the presence of the lambda Bootis pattern between main-sequence stars. Finally, we suggest that the formation of planets around lambda Bootis stars, such as HR 8799 and HD 169142, is also possible through the core accretion process and not only gravitational instability.2021A&A...647A..49Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/647/A49CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/647/A49https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/647/A49http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/647/A49https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/647/A49https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/647/A49http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/647/A49GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/647/A49/table3 (Fundamental parameters derived for the stars in this work)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/647/A49/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/647/A49/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/647/A49/table3?GETtext/xml+votable180.050000true86.8212083-51.06650.0055555555555555566/2335 4632 10695 12398 12821 13044 14446 14667 14906 16289 17398 20125 22511 22773 24796 28762 34054 36351 37175 38223 38489 39429 39640 41759 42036 42047 42072 42910 43224 43298 43540 43733 44139 44258 45041 45247 46939https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/647/A49?format=asciidefaultJ/A+A/647/A49/table3Fundamental parameters derived for the stars in this workSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAbundDisplay chemical abundances in table A1meta.ref.urlcharStarStar namemeta.id;meta.maincharTeffEffective temperatureKphys.temperature.effectiveinte_TeffEffective temperature errorKstat.error;phys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloate_loggSurface gravity errorlog(cm.s**-2)stat.errorfloatvmicroMicroturbulent velocitykm/sphys.velocfloate_vmicroMicroturbulent velocity errorkm/sstat.errorfloatvsiniRotational velocitykm/sphys.veloc.rotatfloate_vsiniRotational velocity errorkm/sstat.error;phys.veloc.rotatfloatRAJ2000Simbad right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Simbad declination (J2000)pos.eq.dec;meta.mainJ/A+A/647/A49/tablea1Chemical abundances of early-type starse3Uncertainty due to gravitystat.error;phys.abundfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharElementChemical speciephys.atmol.elementchar[N/H]Abundance relative to the Sunphys.abundfloatEtotTotal abundance errorstat.error;phys.abundfloate1Dispersion of different linesstat.error;phys.abundfloate2Uncertainty due to temperaturestat.error;phys.abundfloate4Uncertainty due to microturbulencestat.error;phys.abundfloat