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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:2
UID:UW-Physics-Event-8256
DTSTART:20230419T160000Z
DTEND:20230419T230000Z
DTSTAMP:20260414T053001Z
LAST-MODIFIED:20230417T143945Z
LOCATION:4274 Chamberlin
SUMMARY:Reconstruction of the Radial Velocity Field of the Universe wi
 th a joint CMB and Large Scale Structure likelihood analysis\, Prelimi
 nary Exam\, Yurii Kvasiuk\, Physics Graduate Student
DESCRIPTION:We develop an optimization-based maximum likelihood approa
 ch to analyze the cross-correlation of the Cosmic Microwave Background
  (CMB) and the Large-Scale Structure (LSS) induced by the kinetic Suny
 aev-Zeldovich effect. Our main goal is to reconstruct the radial veloc
 ity field of the universe. While the existing quadratic estimator (QE)
  is statistically optimal for current and near-term experiments\, the 
 likelihood can extract more signal-to-noise in the future. Our likelih
 ood formulation has further advantages over the QE\, such as the possi
 bility of jointly fitting cosmological and astrophysical parameters. W
 e implement an auto-differentiable likelihood pipeline in JAX\, which 
 is computationally tractable for a realistic survey resolution\, and e
 valuate it on the Agora simulation.
URL:https://www.physics.wisc.edu/events/?id=8256
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