Ian Roederer (North Carolina State University): Ultraviolet spectroscopy of metal-poor stars: new advances and new opportunities

Monday 16 Jun 2025, 14:00 → 15:00 Europe/Stockholm

Å90101

Title: Ultraviolet spectroscopy of metal-poor stars: new advances and new opportunities
Speaker: Ian Roederer
Affiliation: North Carolina State University
Time: Monday 16 June 2025, 1400 to 1500
Location: Å90101

Abstract:

Understanding the origin of the elements remains one of the major challenges of modern astrophysics.  Ultraviolet (UV) spectroscopy of metal-poor stars provides access to hundreds of absorption lines of elements and species that are otherwise undetectable in optical or infrared spectra.  I will show how these lines have the potential to provide new calibrations for NLTE radiative transfer calculations.  I will present one example of a new advance enabled by UV spectroscopy, the first detection of elements produced by transuranic fission fragments in stars.  This example demonstrates the potential of UV spectroscopy to help shape the experiments carried out by the Extremely Large Telescope and future space flagship missions in the 2030s and 2040s to further shape our understanding of our own cosmic origins.