6 papers
Chemical signatures from the first stars embedded in metal-poor gas in galaxies at cosmic dawn
Clara L. Pollock, Kasper E. Heintz, Elka Rusta +15
The first generation of stars formed from pristine, neutral hydrogen gas. The most massive of these exploded as supernovae within a few million years of their birth, producing the…
NEFERTITI: Linking early galaxy formation to the assembly of the Milky Way
Ioanna Koutsouridou, Stefania Salvadori, Ãsa Skúladóttir +5
We use a new implementation of the NEFERTITI galaxy formation model, coupled to high-resolution Caterpillar dark-matter simulations of Milky Way (MW) analogues, to connec…
The Pristine HeII Emitter near GN-z11: Constraining the Mass Distribution of the First Stars
Elka Rusta, Stefania Salvadori, Roberto Maiolino +6
The properties of the first metal-free stars remain largely unknown, and so far, the only data-driven constraints on their mass distribution (IMF) come from near-field cosmology. H…
The search for Population III: Confirmation of a HeII emitter with no metal lines at z=10.6
Roberto Maiolino, Hannah Ãbler, Michele Perna +49
We report the confirmation of a HeII1640 emitter located at 3 pkpc from the galaxy GN-z11, at z=10.6. The detection, based on JWST NIRSpec-IFU high-resolution spectroscopy, con…
GA-NIFS and JADES: Confirmation of pristine gas near GN-z11
Hannah Ãbler, Roberto Maiolino, Pablo G. Pérez-González +32
According to the leading cosmological model, a first generation of stars called Population III (PopIII), condensed almost entirely out of hydrogen and helium, must have initiated t…
Metal-polluted Population III galaxies and How to Find Them
Elka Rusta, Stefania Salvadori, Viola Gelli +4
Observing Population III (hereafter PopIII) galaxies, the hosts of first-generation stars, remains challenging even with the JWST. The current few candidates have been identified t…