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SUMMARY:The First Chapters of Galaxy and Black Hole Build-up Revealed by J
 WST  - Pascal Oesch
DTSTART:20251204T160000Z
DTEND:20251204T170000Z
UID:TALK240721@talks.cam.ac.uk
CONTACT:Jan Scholtz
DESCRIPTION:The first deep images with the James Webb Space Telescope (JWS
 T) have transformed our view of the Universe. From day one\, JWST produced
  one surprise after another: from unexpectedly luminous candidate galaxies
  at z>10\, to an abundant\, new class of obscured black holes\, to massive
  quiescent galaxies when the Universe was only 1-2 Gyr old. With its unpar
 alleled imaging and spectroscopic capabilities\, JWST immediately extended
  our cosmic horizon into uncharted territory\, with galaxies spectroscopic
 ally confirmed to z~14 and candidates identified out to z~16-25\, only ~20
 0 Myr after the Big Bang. We are thus at the brink of finding the first ga
 laxies that ended the cosmic Dark Ages and started the reionization of the
  Universe. Furthermore\, a surprising number of galaxies show broad-line e
 mission in the early Universe indicating a very rapid build-up of early bl
 ack holes. This includes an enigmatic new population known as 'Little Red 
 Dots'\, characterized by their compact morphology and extremely red rest-f
 rame optical colors. In this talk\, I will review how far we have come in 
 understanding early galaxy and black hole build-up thanks to the revolutio
 nary new data with JWST over the past ~3 years and discuss the implication
 s for models of cosmic dawn.
LOCATION:Hoyle Lecture Theatre\, Institute of Astronomy
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