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SUMMARY:Unveiling the ionising properties of galaxies at the Epoch of Reio
 nisation with NIRCam - Dr. Charlotte Simmonds (Kavli Institute for Cosmolo
 gy\, Cambridge)
DTSTART:20240604T101500Z
DTEND:20240604T110000Z
UID:TALK215875@talks.cam.ac.uk
CONTACT:Charles Walker
DESCRIPTION:The Epoch of Reiniosation describes the cosmic period in which
  the Universe went from being dark and neutral\, to being transparent to r
 adiation. Understanding the first galaxies responsible for lighting up the
  Universe is of utmost importance for unveiling the mysteries of this epoc
 h.\n\nIn this talk I will present work done through the use of deep NIRCam
  imaging from the JWST Advanced Deep Extragalactic Survey (JADES) to study
  the evolution of the ionising photon production efficiency\, ξion\, with
  redshift (3 < z < 9). When observing Lyman-alpha emitters (LAEs) and emis
 sion-line galaxies (ELGs)\, we find that low-mass galaxies with bursty sta
 r formation histories are more efficient in producing ionising radiation\,
  and could represent the main drivers of reionisation. However\, we find t
 hat the observed increase of ξion with redshift depends on the nature of 
 the sample: the trends observed in LAEs and ELGs are less significant when
  a stellar-mass complete sample is used instead.\n\nBy combining these res
 ults we find that galaxies are likely the main drivers of reionisation\, a
 nd that there is no crisis in the cosmic ionising budget when a stellar-ma
 ss complete sample is considered.\n\n
LOCATION:Coffee area\, Battcock Centre
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