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SUMMARY:Characterising Nitrogen-Rich Galaxies at z>6 - Dr. Yuki Isobe (Uni
 versity of Cambridge)
DTSTART:20241119T111500Z
DTEND:20241119T120000Z
UID:TALK224662@talks.cam.ac.uk
CONTACT:Charles Walker
DESCRIPTION:The discovery of an unexpectedly high nitrogen-to-oxygen (N/O)
  ratio in a z=10.6 galaxy GN-z11 presents new challenges to our understand
 ing of star formation in the early universe. By analysing publicly availab
 le NIRSpec data\, we have identified two additional galaxies at redshifts 
 z=6.23-8.68 exhibiting supersolar N/O ratios\, significantly exceeding tho
 se of local galaxies with similar metallicities. We emphasise that these n
 itrogen enrichment is also relative to carbon\, suggesting a predominance 
 of material processed through the CNO cycle. This talk will also review ap
 proximately ten galaxies at z>6 now reported to have supersolar N/O ratios
 \, examining shared characteristics that may elucidate the origins of this
  distinct nitrogen enrichment and propose connections to hard ionising sou
 rces\, dense gas\, and globular cluster formation.
LOCATION:Coffee area\, Battcock Centre
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