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SUMMARY:21-cm Cosmology: First Stars and Beyond - Professor Anastasia Fial
 kov
DTSTART:20251104T180000Z
DTEND:20251104T193000Z
UID:TALK236992@talks.cam.ac.uk
CONTACT:129301
DESCRIPTION:Low-frequency radio observations present a unique opportunity 
 to fill a critical gap in our understanding of the early universe\, bridgi
 ng the cosmic microwave background (CMB) last scattering surface with the 
 era of high-redshift galaxies observed by the JWST and ALMA. In this talk\
 , I will discuss the latest theoretical developments\, existing observatio
 nal constraints\, and prospects for future observations. The formation of 
 the first stars and the subsequent population of X-ray binaries drove a fu
 ndamental transition in the state of the universe that the radio telescope
 s can probe. Due to the lack of direct observations\, the properties of th
 ese sources remain highly uncertain. The cosmological 21-cm signal produce
 d by neutral hydrogen gas contains unique information about the first gene
 rations of UV and X-ray sources\, as well as their impact on the surroundi
 ng environment. Observations of the 21-cm signal with the Square Kilometre
  Array (SKA) and its precursors will open a new observational window\, all
 owing us to significantly improve our understanding of these objects and t
 he evolution of the universe.\n\nTalks are priced at £4 for non-Scientifi
 c Society members. Scientific Society members will have free access to all
  our talks. Lifetime membership costs £15 and gives free access to all ta
 lks\, members-only events and priority access to oversubscribed SciSoc eve
 nts.
LOCATION:Pfizer Lecture Theatre\,  Department of Chemistry\, Lensfield Roa
 d
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