J/A+A/619/A130ivo://CDS.VizieR/J/A+A/619/A130doi:10.26093/cds/vizier.36190130CDSAdibekyan V.de Laverny P.Recio-Blanco A.Sousa S.G.Delgado-Mena E.,Kordopatis G.Ferreira A.C.S.Santos N.C.Hakobyan A.A.Tsantaki M.2018-12-13T12:19:19Z2018-11-16T08:51:30ZCDS support team

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

cds-question@unistra.frchemical-abundancesstellar-agesthe-sunFinding solar siblings, that is, stars that formed in the same cluster as the Sun, will yield information about the conditions at the Sun's birthplace. Finding possible solar siblings is difficult since they are spread widely throughout the Galaxy. We search for solar sibling candidates in AMBRE, the very large spectra database of solar vicinity stars. Since the ages and chemical abundances of solar siblings are very similar to those of the Sun, we carried out a chemistry- and age-based search for solar sibling candidates. We used high-resolution spectra to derive precise stellar parameters and chemical abundances of the stars. We used these spectroscopic parameters together with Gaia DR2 astrometric data to derive stellar isochronal ages. Gaia data were also used to study the kinematics of the sibling candidates. From the about 17000 stars that are characterized within the AMBRE project, we first selected 55 stars whose metallicities are closest to the solar value (-0.1<=[Fe/H]<=0.1dex). For these stars we derived precise chemical abundances of several iron-peak, {alpha}- and neutron-capture elements, based on which we selected 12 solar sibling candidates with average abundances and metallicities between -0.03 to 0.03dex. Our further selection left us with 4 candidates with stellar ages that are compatible with the solar age within observational uncertainties. For the 2 of the hottest candidates, we derived the carbon isotopic ratios, which are compatible with the solar value. HD186302 is the most precisely characterized and probably the most probable candidate of our 4 best candidates. Very precise chemical characterization and age estimation is necessary to identify solar siblings. We propose that in addition to typical chemical tagging, the study of isotopic ratios can give further important information about the relation of sibling candidates with the Sun. Ideally, asteroseismic age determinations of the candidates could solve the problem of imprecise isochronal ages.2018A&A...619A.130Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/619/A130CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/787/154 : Solar sibling candidates elemental abundances (Ramirez+, 2014)J/ApJ/837/15 : WISE IR excesses among main sequence stars (Da Costa+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/619/A130https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/619/A130http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/619/A130https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/619/A130https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/619/A130http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/619/A130GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/619/A130/abund (Abundances for each star and element (table A1))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/619/A130/abund?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/619/A130/abund?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/619/A130/abund?GETtext/xml+votable180.050000true96.83520862.90829110.0055555555555555566/4289 12644 14914 16775 16841 17144 17572 19664 20614 20676 21080 21594 21604 22078 22199 22408 25826 26256 27088 29143 30301 31039 33510 33528 34350 34686 35021 35396 35452 37163 37222 37944 38055 38330 38813 39011 39584 39888 39978 41023 42360 43781 44150 44753 45640 46479 47077 47207 47510 47803 48113 48188 48361 48572https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/619/A130?format=asciidefaultJ/A+A/619/A130/abundAbundances for each star and element (table A1)[BaII/H]? Abundance [BaII/H]log(Sun)phys.abundfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar's identifiermeta.id;meta.mainchar[NaI/H]Abundance [NaI/H]log(Sun)phys.abundfloate_[NaI/H]Uncertainty of [NaI/H]log(Sun)stat.error;phys.abundfloat[MgI/H]? Abundance [MgI/H]log(Sun)phys.abundfloatnullablee_[MgI/H]? Uncertainty of [MgI/H]log(Sun)stat.error;phys.abundfloatnullable[AlI/H]? Abundance [AlI/H]log(Sun)phys.abundfloatnullablee_[AlI/H]? Uncertainty of [AlI/H]log(Sun)stat.error;phys.abundfloatnullable[SiI/H]Abundance [SiI/H]log(Sun)phys.abundfloate_[SiI/H]Uncertainty of [SiI/H]log(Sun)stat.error;phys.abundfloat[CaI/H]Abundance [CaI/H]log(Sun)phys.abundfloate_[CaI/H]Uncertainty of [CaI/H]log(Sun)stat.error;phys.abundfloat[ScII/H]Abundance [ScII/H]log(Sun)phys.abundfloate_[ScII/H]Uncertainty of [ScII/H]log(Sun)stat.error;phys.abundfloat[TiI/H]Abundance [TiI/H]log(Sun)phys.abundfloate_[TiI/H]Uncertainty of [TiI/H]log(Sun)stat.error;phys.abundfloat[CrI/H]Abundance [CrI/H]log(Sun)phys.abundfloate_[CrI/H]Uncertainty of [CrI/H]log(Sun)stat.error;phys.abundfloat[NiI/H]Abundance [NiI/H]log(Sun)phys.abundfloate_[NiI/H]Uncertainty of [NiI/H]log(Sun)stat.error;phys.abundfloate_[BaII/H]? Uncertainty of [BaII/H]log(Sun)stat.error;phys.abundfloatnullable[CeII/H]? Abundance [CeII/H]log(Sun)phys.abundfloatnullablee_[CeII/H]? Uncertainty of [CeII/H]log(Sun)stat.error;phys.abundfloatnullable[CuI/H]? Abundance [CuI/H]log(Sun)phys.abundfloatnullablee_[CuI/H]? Uncertainty of [CuI/H]log(Sun)stat.error;phys.abundfloatnullable[EuII/H]? Abundance [EuII/H]log(Sun)phys.abundfloatnullablee_[EuII/H]? Uncertainty of [EuII/H]log(Sun)stat.error;phys.abundfloatnullable[NdII/H]? Abundance [NdII/H]log(Sun)phys.abundfloatnullablee_[NdII/H]? Uncertainty of [NdII/H]log(Sun)stat.error;phys.abundfloatnullable[SrI/H]? Abundance [SrI/H]log(Sun)phys.abundfloatnullablee_[SrI/H]? Uncertainty of [SrI/H]log(Sun)stat.error;phys.abundfloatnullable[YII/H]? Abundance [YII/H]log(Sun)phys.abundfloatnullablee_[YII/H]? Uncertainty of [YII/H]log(Sun)stat.error;phys.abundfloatnullable[ZnI/H]? Abundance [ZnI/H]log(Sun)phys.abundfloatnullablee_[ZnI/H]? Uncertainty of [ZnI/H]log(Sun)stat.error;phys.abundfloatnullable[ZrII/H]? Abundance [ZrII/H]log(Sun)phys.abundfloatnullablee_[ZrII/H]? Uncertainty of [ZrII/H]log(Sun)stat.error;phys.abundfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_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