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SUMMARY:Rana Ezzeddine (University of Florida)
DTSTART:20200508T180000Z
DTEND:20200508T190000Z
DTSTAMP:20260423T005727Z
UID:IReNA/1
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/IReNA/1/">In
 sights into the lives (and deaths) of the first stars from observations of
  metal-poor stars</a>\nby Rana Ezzeddine (University of Florida) as part o
 f IReNA online seminar\n\n\nAbstract\nThe oldest\, most metal-poor stars f
 ound in the Galactic halo and satellite dwarf galaxies retain in their atm
 ospheres the chemical footprints of the high redshift Universe. Employing 
 “stellar archaeology” – the diverse use of the chemical and dynamica
 l properties of metal-poor stars – outstanding questions about the early
  Universe can be answered. Using high resolution optical and UV spectrosco
 pic observations of the dataset of the most chemically interesting metal-p
 oor stars\, I aim to probe the nature of the first stars and supernovae ex
 plosions (SNe)\, the relevant nucleosynthesis processes responsible for th
 e formation and evolution of the elements as well as early star and galaxy
  formation processes. I will discuss how we I’ve used the most metal-poo
 r Galactic stars to help elucidate the nature of their first star progenit
 ors and mechanisms of the SNe responsible for their chemical signatures. I
  will highlight how these metal-deficient stars could be used to place con
 straints on modelling of non-equilibrium steady-state systems\, as applied
  to studies of stellar and planetary atmospheres. Additionally\, I will to
 uch on recent advancements in our understanding of the heaviest elements f
 ormation in metal-poor stars via the r(apid) neutron capture r-process\, e
 specially in light of the ground-breaking gravitational wave discovery of 
 the binary neutron star mergers event GW170817.\n
LOCATION:https://researchseminars.org/talk/IReNA/1/
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