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SUMMARY:Interferometric measurements of the 21-cm signal with the SKA - Yu
 chen Liu & Oscar O'Hara (Cavendish Astrophysics)
DTSTART:20240213T111500Z
DTEND:20240213T120000Z
UID:TALK212179@talks.cam.ac.uk
CONTACT:Charles Walker
DESCRIPTION:The Cosmic Dawn marks the first star formations and preceded t
 he Epoch-of-Reionization\, when the Universe underwent a fundamental trans
 formation propelled by the radiation from these first stars and galaxies. 
 Interferometric 21-cm experiments aim to probe redshifted neutral hydrogen
  signals from these periods\, constraining the conditions of the early Uni
 verse. The SKA-LOW instrument of the Square Kilometre Array telescope is e
 nvisaged to be the largest and most sensitive radio telescope at m and cm 
 wavelengths. In this talk we present a data analysis pipeline that was use
 d in the SKA Science Data Challenge 3a: Epoch of Reionisation (SKA SDC3a) 
 to process the novel data products expected from the SKA. To determine whe
 ther a successful 21-cm detection is possible with the envisaged SKA\, we 
 implement predictive foreground and Bayesian Gaussian Process Regression m
 odels alongside a foreground avoidance strategy to isolate the 21-cm signa
 l from that of the astrophysical radio frequency (RF) foregrounds. 
LOCATION:Coffee area\, Battcock Centre
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