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Abundances of neutron-capture elements in stars of the galactic disk substructures

hal.structure.identifierAstronomical observatory of Odessa National University [Odessa]
dc.contributor.authorMISHENINA, T. V.
dc.contributor.authorPIGNATARI, M.
hal.structure.identifierAstronomical observatory of Odessa National University [Odessa]
dc.contributor.authorKOROTIN, S. A.
hal.structure.identifierM2A 2013
dc.contributor.authorSOUBIRAN, C.
hal.structure.identifierUniversité de Genève = University of Geneva [UNIGE]
dc.contributor.authorCHARBONNEL, Corinne
dc.contributor.authorTHIELEMANN, F. -K.
hal.structure.identifierAstronomical observatory of Odessa National University [Odessa]
dc.contributor.authorGORBANEVA, T. I.
dc.contributor.authorBASAK, N. Yu.
dc.date.created2013-03-07
dc.date.issued2013
dc.identifier.issn0004-6361
dc.description.abstractEnThe aim of this work is to present and discuss the observations of the iron peak (Fe, Ni) and neutron-capture element (Y, Zr, Ba, La, Ce, Nd, Sm, and Eu) abundances for 276 FGK dwarfs, located in the galactic disk with metallicity -1 < [Fe/H] < +0.3. Atmospheric parameters and chemical composition of the studied stars were determined from an high resolution, high signal-to-noise echelle spectra obtained with the echelle spectrograph ELODIE at the Observatoire de Haute-Provence (France). Effective temperatures were estimated by the line depth ratio method and from the H_{\alpha} line-wing fitting. Surface gravities (log g) were determined by parallaxes and the ionization balance of iron. Abundance determinations were carried out using the LTE approach, taking the hyperfine structure for Eu into account, and the abundance of Ba was computed under the NLTE approximation. We are able to assign most of the stars in our sample to the substructures of the Galaxy thick disk, thin disk, or Hercules stream according to their kinematics. The classification of 27 stars is uncertain. For most of the stars in the sample, the abundances of neutron-capture elements have not been measured earlier. For all of them, we provide the chemical composition and discuss the contribution from different nucleosynthesis processes.
dc.language.isoen
dc.publisherEDP Sciences
dc.title.enAbundances of neutron-capture elements in stars of the galactic disk substructures
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/201220687
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.identifier.arxiv1303.1730
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageid.A128
bordeaux.volume552
bordeaux.peerReviewedoui
hal.identifierhal-00798835
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00798835v1
bordeaux.COinSctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&amp;rft.date=2013&amp;rft.volume=552&amp;rft.spage=id.A128&amp;rft.epage=id.A128&amp;rft.eissn=0004-6361&amp;rft.issn=0004-6361&amp;rft.au=MISHENINA,%20T.%20V.&amp;PIGNATARI,%20M.&amp;KOROTIN,%20S.%20A.&amp;SOUBIRAN,%20C.&amp;CHARBONNEL,%20Corinne&amp;rft.genre=article


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