November 12 - 18, 2017 — IESC,
The CMB from A to Z
challenges of the CMB as a cosmological probe
The cosmic infrared background and integrated Sachs-Wolfe effect: can we constrain the cosmological parameters?
Laboratoire d'Astrophysique de Marseille, Aix-Marseille University
: 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.