State of the Universe
Removing a hidden foreground leakage from harmonic space ILC algorithm and analysis of Planck and WMAP data
by Prof. Rajib Saha (IISER-Bhopal)
Tuesday, March 14, 2017
from
to
(Asia/Kolkata)
at A304
at A304
Description |
We discover usual harmonic space Internal-Linear-Combination (ILC) algorithm for foreground minimization inevitably contaminates its outcome by a hitherto unaccounted for leakage signal that arise due to foreground components. We propose a method to nullify the leakage and apply the improved ILC algorithm on Planck-2015 and WMAP 9-year data. We discuss a few other improvements of the harmonic space ILC algorithm. Our CMB cleaned map and its angular power spectrum agrees with Planck published results with some differences at different multipole ranges. |
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