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dc.creatorRoederer, Ian U.en_US
dc.creatorPreston, George W.en_US
dc.creatorThompson, Ian B.en_US
dc.creatorShectman, Stephen A.en_US
dc.creatorSneden, Christopheren_US
dc.date.accessioned2016-04-28T19:34:47Z
dc.date.available2016-04-28T19:34:47Z
dc.date.issued2014-04en
dc.identifierdoi:10.15781/T2951Z
dc.identifier.citationRoederer, Ian U., George W. Preston, Ian B. Thompson, Stephen A. Shectman, and Christopher Sneden. "Neutron-capture Nucleosynthesis in the First Stars." The Astrophysical Journal, Vol. 784, No. 2 (Apr., 2014): 158.en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/34801
dc.description.abstractRecent studies suggest that metal-poor stars enhanced in carbon but containing low levels of neutron-capture elements may have been among the first to incorporate the nucleosynthesis products of the first generation of stars. We have observed 16 stars with enhanced carbon or nitrogen using the MIKE Spectrograph on the Magellan Telescopes at Las Campanas Observatory and the Tull Spectrograph on the Smith Telescope at McDonald Observatory. We present radial velocities, stellar parameters, and detailed abundance patterns for these stars. Strontium, yttrium, zirconium, barium, europium, ytterbium, and other heavy elements are detected. In four stars, these heavy elements appear to have originated in some form of r-process nucleosynthesis. In one star, a partial s-process origin is possible. The origin of the heavy elements in the rest of the sample cannot be determined unambiguously. The presence of elements heavier than the iron group offers further evidence that zero-metallicity rapidly rotating massive stars and pair instability supernovae did not contribute substantial amounts of neutron-capture elements to the regions where the stars in our sample formed. If the carbon-or nitrogen-enhanced metal-poor stars with low levels of neutron-capture elements were enriched by products of zero-metallicity supernovae only, then the presence of these heavy elements indicates that at least one form of neutron-capture reaction operated in some of the first stars.en_US
dc.description.sponsorshipU.S. National Science Foundation AST 12-11585en_US
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.subjectnuclear reactions, nucleosynthesis, abundancesen_US
dc.subjectstars: abundancesen_US
dc.subjectstars: atmospheresen_US
dc.subjectstars: carbonen_US
dc.subjectstars: population iien_US
dc.subjectstars:en_US
dc.subjectpopulation iiien_US
dc.subjectmetal-poor starsen_US
dc.subjectdwarf spheroidal galaxyen_US
dc.subjectcomprehensive abundanceen_US
dc.subjectanalysisen_US
dc.subjecthigh-resolution spectroscopyen_US
dc.subjecthorizontal-branch starsen_US
dc.subjecthole-forming supernovaeen_US
dc.subjectkeck pilot programen_US
dc.subjectred giant branchen_US
dc.subjectwayen_US
dc.subjectstellar haloen_US
dc.subjectless-than -5.0en_US
dc.subjectastronomy & astrophysicsen_US
dc.titleNeutron-Capture Nucleosynthesis In The First Stars*en_US
dc.typeArticleen_US
dc.description.departmentAstronomyen_US
dc.identifier.Filename2014_04_neutroncapture.pdfen_US
dc.rights.restrictionOpenen_US
dc.identifier.doi10.1088/0004-637x/784/2/158en_US
dc.contributor.utaustinauthorSneden, Christopheren_US
dc.relation.ispartofserialAstrophysical Journalen_US


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