Dr. Rok Roškar: Galactic Archaeology in Light of Migrant Stars
Galactic Archaeology in Light of Migrant Stars
dr. Rok Roškar
Institute for Theoretical Physics, University of Zürich
The disks of spiral galaxies build up through a variety of processes. The demographics of stars, their kinematic and chemical properties, that we observe today represent a historic record of these past events.
Recently, it has been recognized that stars can efficiently "surf" on the crests of spiral waves throughout the disk, meaning that their present-day locations may have nothing to do with their birth environment. This radial mixing makes the disk a much more diverse place and galactic archaeology much more difficult.
I will discuss the recent advances in our understanding of this process, its implications ranging from astrobiology to extragalactic disks, and place it in the context of cosmological galaxy formation.
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