Probing the early Universe through the shroud of foregrounds and systematics, using future CMB space satellites.

by Ranajoy Banerji (APC-IN2P3)


Future proposed CMB missions target a sensitivity of 10e-3 on the tensor to scalar ratio (r) of the perturbations from Inflation, among a host of other cosmological and astrophysical observables. The weak CMB polarisation signal is dominated at all frequencies by galactic foregrounds, and at the required sensitivities, systematic effects due to small uncertainties in instrumental parameters can become science limiting. We look at, from a data analyst's perspective, why it's important to have a CMB space mission, and means and methods by which we can minimise the contamination from foregrounds and systematics, and disentangle the cosmological signal to achieve optimal science goals.