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SUMMARY:Combining delensing and foreground cleaning for the Simons Observa
 tory - Emilie Hertig
DTSTART:20230201T131500Z
DTEND:20230201T134000Z
UID:TALK196825@talks.cam.ac.uk
CONTACT:107642
DESCRIPTION:CMB polarization patterns hold the key to unveiling physical p
 rocesses at play in the instants directly following the birth of the unive
 rse\; primordial B-modes\, in particular\, are highly sought after as thei
 r observation would allow to determine the energy scale of inflation. The 
 Simons Observatory (SO)\, currently in construction in the Atacama Desert 
 and due to start operations in 2023\, is expected set significantly tighte
 r constraints on the tensor-to-scalar ratio r than any previous CMB experi
 ment. Reaching SO’s target precision requires a thorough understanding a
 nd mitigation of other large-scale B-mode sources such as Galactic foregro
 unds and weak gravitational lensing. In this talk\, I will present a first
  demonstration of simultaneous foreground cleaning and delensing on SO-lik
 e simulations\, using a cross-spectral component separation algorithm adap
 ted to include a lensing B-mode template. The improvement of after delensi
 ng will be assessed in the presence of increasingly complex foregrounds\, 
 and prospects for further optimization will be outlined.
LOCATION:The Hoyle Lecture Theatre + Zoom 
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