Gabriele Cescutti (AIP)

The First Stars: chemical signatures in the Milky Way
When Sep 06, 2013 from 10:30 AM to 12:00 PM
What
  • Colloquium
Where SH, Lecture hall
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Soon after the Big Bang, the appearance of the first stellar generations drastically changed the course of the history of the Universe by enriching the primordial gas with elements heavier than helium through both stellar winds and supernova explosions. High-resolution hydrodynamical simulations of the formation of the First Stars suggest that these objects have played a key role in the formation of the first galaxies. The only way to currently validate the picture arising from the most modern hydro-dynamical simulations of the formation of First Stars is to search for their imprints left on the oldest stars in our Galaxy. The observed chemical signatures coupled with chemical evolution models, can provide new insights to check the validity of the theoretical predictions of stellar formation in the early Universe.  In the last years our group has found that many chemical anomalies observed in very metal-poor halo stars, suggest the first stellar generations to have been fast rotators; similar findings can be also extended to the old population of the Galactic bulge.