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SUMMARY:Unveiling the Cosmic Dawn and the Epoch of Re-ionization with Radi
 o Observations - Eloy de Lera Acedo and Anastasia Fialkov
DTSTART:20230526T103000Z
DTEND:20230526T113000Z
UID:TALK199375@talks.cam.ac.uk
CONTACT:Steven Brereton
DESCRIPTION:The “forbidden" radio signal of atomic hydrogen produced at 
 the intrinsic wavelength of 21 cm could help us solve some of the remainin
 g cosmic mysteries. For example\, it could advance our understanding of th
 e formation process of the very first stars\, black holes and galaxies\, a
 nd clarify the ultimate phase transition that the Universe went through - 
 the process of reionization. The field of 21-cm cosmology is rapidly progr
 essing in both observations and modelling. In this talk\, we will review t
 he state of the art of the field and discuss some of the exciting developm
 ents pioneered here at KICC both on the theoretical and observational fron
 ts. \n\nKICC researchers lead on several fronts\, including theory\, simul
 ations\, instrumentation development and observations. We are involved in 
 a series of current and future radio telescope projects promising to unloc
 k the infant Universe. These include the future Square Kilometre Array (SK
 A)\, meant to revolutionise studies of these early epochs with its imaging
  capabilities\; the Hydrogen Epoch of Re-ionization Array (HERA)\, current
 ly operating and producing the best upper limits of the 21-cm power spectr
 a from its location in the Karoo radio reserve in South Africa\; the Radio
  Experiment for the Analysis of Cosmic Hydrogen (REACH)\, led and funded b
 y KICC and its researchers\, is about to start observations aiming to prod
 uce the first confident detection of the sky-averaged 21-cm line\; or the 
 CosmoCube space mission\, a nano-sat currently in early development\, it w
 ill explore the cosmic Dark Ages from the most radio pristine observation 
 location in the Solar System (the far-side of Moon’s orbit) within the n
 ext decade. In this talk we will also discuss the prospect of synergetic s
 cience between 21-cm observations and other probes of the Epoch of Re-ioni
 zation\, such as galaxy observations from JWST and other future telescopes
 .\n\nUsing data from current instruments like SARAS3 we have also been abl
 e to produce the best constraints on astrophysics from the Cosmic Dawn\, p
 lacing limits on the parameter space describing the epoch when the Univers
 e underwent the most fundamental transition in its history\, from most sim
 ple darkness to a complex realm of celestial lights. \n
LOCATION:Hoyle Lecture Theatre and online (details to be sent by e-mail)
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