Galactic archaeology with high precision data

05/05/2021 - 14:00 - 15:00
Remoto, com transmissão pela internet
Galactic archaeology with high precision data
Cristina Chiappini
Leibniz-Institut für Astrophysik Potsdam
Since most stars carry the chemical composition inherited at birth in their outer envelopes, it should be possible to map the history of star formation in different parts of the Milky Way by measuring, for stars of different ages, a wide variety of chemical elements covering different nucleosynthetic sites. This objective seems to be still achievable even in the presence of mergers and stellar radial migration, that is, the fact that the stars can move away from their birth places. We will highlight in particular the recent results obtained from the combination of asteroseismology, Gaia, photometric and spectroscopic surveys. So many interesting discoveries can still be made in the most local volumes (thanks to the accuracy of the data). In addition, the new data can also take us out of the very local volume, finally allowing for a more holistic view of our Galaxy. We will finish by discussing where more data is needed and 4MOST's future plans.
Cristina Chiappini received her PhD at the University of Sao Paulo. She was a postdoc at Columbia University and later obtained a permanent position at the Observatory of Trieste.  She then moved to University of Geneva where she was a Maitre Assistant and from there to a permanent position at AIP Potsdam. She is currently the PI of the 4MIDABLE-LR survey, together with Ivan Minchev, that shall observe millions of objects in the disk and bulge using 4MOST. Her main interests are in chemical evolution of galaxies, asteroseismology for galactic archaeology, spectroscopic surveys, chemodynamical models, and more specifically the Galactic bulge and the metal-poor environments.