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SUMMARY:A Systematic Census of Strongly Lensed Population III Galaxy Candi
 dates at z ~ 6–7 from JWST VENUS and MUSE
DTSTART;VALUE=DATE-TIME:20261028T165500Z
DTEND;VALUE=DATE-TIME:20261028T170500Z
DTSTAMP;VALUE=DATE-TIME:20261029T010359Z
UID:indico-contribution-3654@nyx.physics.mcgill.ca
DESCRIPTION:Speakers: Gavin Farley (University of Toronto)\nThe first gene
 ration of stars\, Population III (Pop III)\, likely played a fundamental r
 ole in the formation and evolution of early galaxies. Recent JWST observat
 ions have opened a new window for systematically identifying Pop III signa
 tures at high redshift (z ≈ 3–6)\, during the universe’s first few b
 illion years\, including strong hydrogen emission and weak or absent metal
  lines such as [O III]\, and have revealed a small but growing candidate s
 ample. We conduct a systematic search for extremely metal-poor\, Pop III
 –like galaxies at z ∼ 6–7 using JWST/NIRCam imaging from the VENUS s
 urvey\, the largest lensing-cluster program to date. Combining this data w
 ith deep MUSE spectroscopy\, we search for strongly lensed Pop III candida
 tes whose light is magnified by foreground galaxy clusters. Our search yie
 lds two candidates with spectroscopic redshifts that satisfy our selection
  criteria\, including a highly magnified (μ ∼ 28)\, otherwise inaccessi
 ble\, intrinsically ultra-faint galaxy (M_UV = −15.3) at z = 5.72. This 
 source exhibits strong\, spatially extended Lyα emission\, an extreme Hα
  equivalent width (∼2920 Å)\, a prominent Balmer jump\, and no detectab
 le [O III] in current data—textbook signatures of a young\, metal-poor s
 tellar population consistent with Pop III–like systems. MUSE observation
 s reveal multiple Lyα emitters at the same redshift in the field\, sugges
 ting that the local environment may help sustain such systems even at z = 
 5.7. We present the source-plane properties of these candidates\, their en
 vironments\, and constraints on the number density of Pop III–like galax
 ies at z ∼ 6–7.\n\nhttps://nyx.physics.mcgill.ca/event/587/contributio
 ns/3654/
LOCATION:Online 
URL:https://nyx.physics.mcgill.ca/event/587/contributions/3654/
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