XIIIth School of Cosmology
November 12 - 18, 2017IESC, Cargèse
The CMB from A to Z
promises and challenges of the CMB as a cosmological probe

The cosmic infrared background and integrated Sachs-Wolfe effect: can we constrain the cosmological parameters?

Abhishek Maniyar
Laboratoire d'Astrophysique de Marseille, Aix-Marseille University

Short Talk

Abstract : ISW dominates on the larger angular scales in CMB power spectrum but is limited by cosmic variance. This is why, cross correlation of CMB with galaxy surveys (which trace the matter distribution up to some bias) are used to detect the ISW with greater SNR. CIB traces the large scale structure of the universe. Therefore, we cross-correlate CIB with CMB and we find that this method could give the best SNR ever obtained for the measurement of the ISW signal.
We also perform a Fisher matrix analysis to see if we can constrain the cosmological parameters with the ISW signal obtained using the above cross-correlation between CIB and CMB.