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SUMMARY:Euclid Q1 galaxy clustering and its cross-correlations with CMB le
 nsing
DTSTART:20260303T100000Z
DTEND:20260303T110000Z
DTSTAMP:20260515T040500Z
UID:indico-event-93@indico.iap.fr
DESCRIPTION:Speakers: Margherita Lembo (CNRS / IAP)\n\nCombining Cosmic Mi
 crowave Background (CMB) observations with large-scale structure (LSS) sur
 veys provides a powerful lever arm to probe the growth of structure from r
 ecombination to the present epoch\, test gravity on cosmological scales\, 
 and constrain the properties of dark matter and dark energy.\nIn this talk
 \, I will present the first cosmological analysis of galaxy clustering usi
 ng the Euclid Q1 data release\, together with its cross-correlation with C
 MB lensing convergence maps from Planck and the Atacama Cosmology Telescop
 e. We detect the cross-correlation signal at high significance and find ex
 cellent agreement with predictions from simulations and the Planck 2018 Λ
 CDM cosmology.\nI will discuss a comprehensive set of robustness tests aga
 inst observational systematics\, tomographic measurements across redshift 
 bins\, and initial constraints on galaxy bias and photometric redshift unc
 ertainties. These results highlight the strong potential of Euclid–CMB c
 ross-correlations as a robust cosmological probe and as a powerful tool to
  control systematics in forthcoming Euclid data releases.\n\nhttps://indic
 o.iap.fr/event/93/
LOCATION:Salle des séminaires (IAP)
URL:https://indico.iap.fr/event/93/
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