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The Subaru Seminar is
usually held in Room 104 of the Hilo Base Facility, adjacent
to the main lobby. Everyone is welcome to attend. If you are
interested in giving a seminar, please contact Masayuki
Akiyama by email.
Tuesday 25 February at 13:30pm
"Can we understand how our Galaxy formed by looking at 6Li in old halo stars ?"
Susumu Inoue (Max-Planck-Institut fuer Astrophysik, Germany)
We discuss the production of the element $^6$Li in the
early Galaxy by cosmic rays accelerated at structure
formation shocks, driven by the hierarchical merging of
sub-Galactic halos during Galaxy formation. This picture
can give a better account of the $^6$Li observed to date
in metal-poor halo stars, compared to previous models
based on cosmic rays from supernovae. The $^6$Li abundance
is predicted to show a distinctive evolutionary behavior
not directly related to CNO or Fe, as well as interesting
correlations between the stellar kinematical properties,
which should be clearly testable with further observations.
Detailed studies may also provide us with unique and
critical insight into how the structure of our Galaxy formed
and evolved. The prospects for achieving these goals using
the Subaru HDS are discussed.