ICTP is pleased to announce that the forthcoming ICTP Colloquium
by Professor Timothy Beers on "the Astrophysics Origin of the
Elements in the Periodic Table" will take place on Wednesday 4
September 2019 at 16:30 hrs, in the Budinich Lecture Hall,
Leonardo Building, ICTP.
Biosketch: Timothy Beers is the Grace-Rupley Professor of
Physics at the University of Notre Dame, and a co-PI in the
Physics Frontier Center JINA-CEE (Joint Institute for Nuclear
Astrophysics – Center for the Evolution of the Elements), funded
by the US National Science Foundation. He is a former director of
the US Kitt Peak National Observatory, and spent 25 years working
as a Professor in Physics & Astronomy at Michigan State
University. Beers is interested in the origin and evolution of the
elements in the Universe, and the assembly of large spiral
galaxies such as the Milky Way, a field now referred to as
Galactic Archaeology. For decades, Professor Beers has designed
and executed large-scale surveys of stars in the Milky Way,
efficiently sifting through literally millions of individual stars
in order to find those objects that have recorded the chemical
history of the Universe in their atmospheres. His work has led to
the identification of a subset of the so-called carbon-enhanced
metal-poor (CEMP) stars that exhibit a characteristic
light-element signature (enhanced C, N, O, Na, Si, Mg), now
recognized to be due to nucleosynthesis processes associated with
the very first stars born in the Universe. Presently he is
conducting a survey for so-called r-process-enhanced stars, which
are metal-poor stars that exhibit over-abundances of elements
produced by the rapid neutron-capture process, and place strong
constraints on the origin of over half of the elements beyond iron
in the Periodic Table.
Abstract: In this, the
150th Anniversary year of Mendeleyev’s Periodic Table,
astronomers have pieced together plausible origin stories for
most of the elements formed in nature. From the breakthrough
observations of Paul Merrill (1952), which first demonstrated
that essentially all elements beyond H and He were formed in
stars, to the discovery of the astrophysical origin of the rapid
neutron-capture elements in binary neutron star mergers (2017),
I present a summary of our modern understanding of this
fascinating history. I also highlight a number of remaining
questions, and how astronomers and physicists are working to
fill in our gaps in knowledge.
More information is available at http://indico.ictp.it/event/8984/
The Colloquium will be livestreamed at ictp.it/livestream
Light refreshments will be served after the talk.
You are all very warmly invited to attend.
With best regards,
Office of the Director, ICTP