Colloquia Schedule Fall 2013
Colloquia are on Tuesdays (unless otherwise indicated) at 3:30 pm in RLM 15.216B
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Title: TBA Speaker: McDonald Observatory Director Candidate Affiliation: TBD host: TBA |
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Title: TBA Speaker: McDonald Observatory Director Candidate Affiliation: TBD host: TBA |
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Title: TBA Speaker: McDonald Observatory Director Candidate Affiliation: TBD host: TBA |
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Title: TBA Affiliation: TBD host: TBA |
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Title: TBA This is a review of the quest to determine the chemical
abundances of the oldest stars in the Galaxy, the members
of the halo field and globular cluster populations. From
forty years of spectroscopic studies, it appears that
cluster and field stars are not chemically identical
but differ significantly especially in the behavior of
O, Na, Mg and Al. We explore both deep mixing and primordial
abundance variations as explanations for these differences,
and find that both are needed. The unusual abundance ratios
of the Mg isotopes found in some clusters points to the
importance of a primordial "pollution" scenario involving
the output of intermediate mass AGB (asymptotic mass branch)
stars. We discuss briefly scenarios for the formation of
the Galactic halo. Affiliation: TBD host: TBA |
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Bashfest Postdoc Symposium: 6-9 October. No Colloquium talk scheduled on 8 October, to avoid conflict. |
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Title: TBA Pennsylvania State University host: Adam Kraus |
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Title: TBA Affiliation: TBD host: TBA |
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Title: TBA Affiliation: TBD host: TBA |
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Title: TBA Harvard-Smithsonian Center for Astrophysics host: Neal Evans |
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Title: TBA Affiliation: TBD host: TBA |
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Title: TBA Affiliation: TBD host: TBA |
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Title: TBA Affiliation: TBD host: TBA |
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Title: TBA Affiliation: TBD host: TBA |
Visitors to the Department of Astronomy can find detailed information and maps on our Visiting Austin Page.
Please report omissions/corrections to: G. Orris at argus@astro.as.utexas.edu.