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Shedding light on lithium evolution: the globular cluster perspective
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Observational Astronomy.
2012 (English)In: Memorie della Societa Astronomica Italiana Supplementi, ISSN 1824-0178, Vol. 22, 64- p.Article in journal (Refereed) Published
Abstract [en]

I shall review what has been learnt during 20 years of lithium observations in stars belonging to metal-poor globular clusters. The focus will be on little evolved main- sequence, turnoff-point (TOP) and subgiant-branch (SGB) stars expected to display Spite-plateau lithium abundances like those found in the majority of field stars of similar metallicities. But is the Spite plateau of globular clusters the same as those of field stars? What effect does, e.g., cluster-internal pollution have on lithium abundances in the now dominant second generation of stars? It will be shown that it is primarily our incomplete knowledge of the temperature scale of Population II stars which currently limits the diagnostic power of globular clusters as regards the stellar-surface evolution of lithium.

Place, publisher, year, edition, pages
2012. Vol. 22, 64- p.
Keyword [en]
stars: Population II, stars: atmospheres, diffusion, stars: abundances, line: formation, globular clusters: individual (NGC 6397, NGC 6752, M 4), cosmology: early universe, techniques: spectroscopic
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:uu:diva-196804OAI: oai:DiVA.org:uu-196804DiVA: diva2:610966
Available from: 2013-03-13 Created: 2013-03-13 Last updated: 2013-04-05Bibliographically approved

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Korn, A. J.

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