On the degeneracy between primordial tensor modes and cosmic strings in future CMB data from Planck

Details On the degeneracy between primordial tensor modes and cosmic strings in future CMB data from Planck On the degeneracy between primordial tensor modes and cosmic strings in future CMB data from Planck

2008-03-13

arxiv.org/abs/0803.2059v2

Phys.Rev.D77:123005,2008

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures. Minor changes to match published version

Scientific paper

10.1103/PhysRevD.77.123005

While observations indicate that the predominant source of cosmic inhomogeneities are adiabatic perturbations, there are a variety of candidates to provide auxiliary trace effects, including inflation-generated primordial tensors and cosmic defects which both produce B-mode cosmic microwave background (CMB) polarization. We investigate whether future experiments may suffer confusion as to the true origin of such effects, focusing on the ability of Planck to distinguish tensors from cosmic strings, and show that there is no significant degeneracy.

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