BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Current constraints on non-Gaussianity and future developments
DTSTART:20260414T090000Z
DTEND:20260414T100000Z
DTSTAMP:20260515T040700Z
UID:indico-event-129@indico.iap.fr
DESCRIPTION:Speakers: Michele Citran (APC/IJCLab)\n\nNon-Gaussianity in co
 smology refers to deviations from Gaussian statistics in cosmological obse
 rvables and is commonly probed through the three-point correlator\, the bi
 spectrum. Primordial non-Gaussianity (PNG)\, i.e. the bispectrum of primor
 dial fluctuations\, provides a powerful probe of inflationary physics and 
 a means of discriminating between competing inflationary models.\nI will p
 resent how our analysis of the Planck Release 4 (PR4) data has yielded the
  most stringent constraints to date on scalar PNG. I will then discuss how
  future missions\, such as LiteBIRD\, will further enhance these measureme
 nts by accessing the tensor sector.\nNext\, I will introduce a new formali
 sm for the Spectral Matching Independent Component Analysis (SMICA) method
  that incorporates higher-order statistical information from foregrounds. 
 This framework enables direct bispectrum estimation from frequency-channel
  maps\, allowing for the simultaneous recovery of the bispectra of multipl
 e components. By shifting non-Gaussianity estimation from the cleaned-map 
 stage to the component-separation step\, this approach more effectively pr
 opagates and controls foreground-related uncertainties.\nFinally\, I will 
 briefly introduce my current research on novel probes of non-Gaussianity a
 nd on studying correlations across different scales.\n\nhttps://indico.iap
 .fr/event/129/
LOCATION:Salle des séminaires (IAP)
URL:https://indico.iap.fr/event/129/
END:VEVENT
END:VCALENDAR