Image of Alice in Wonderland at the Mad Hatter's tea party You are cordially invited to afternoon tea and biscuits wine and chocolate

Astronomy Tea Talks at Caltech

Mondays, Hameetman auditorium (Cahill)
Tea:  4.00pm
Talk: 4.15pm

Organized by:

2009 - 2010 season:
19 October 2009 Andreas Koch (Leicester)

'All quiet in the outer halo - Chemical abundances in dSphs and outer halo globular clusters'

Our knowledge about chemical abundances and the evolutionary histories of
the more luminous dwarf spheroidal (dSph) galaxies is constantly growing.
However, little is known about the enrichment of the ultra-faint systems
that are discovered in large numbers in sky surveys.
Recent data indicate that these galaxies are predominantly metal poor and
the most recent high-resolution abundance analyses have shown that some
of these galaxies experienced highly inhomogenous chemical enrichment,
where star formation proceeds locally on the smallest scales.
In this talk, I will review the presently available chemical abundance
information of the (ultra-) faint Milky Way satellite dSphs and a few
globular clusters in the outer halo. Moreover, some of the most
peculiar element and inhomogeneous enrichment patterns will be discussed
and related to the question of to what extent the faintest dSph candidates
and outer halo globular clusters could have contributed to the metal poor
Galactic halo.

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Last modified on 20th Jul 2011 by Dominik A. Riechers.  

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