Degeneracy between primordial tensor modes and cosmic strings in future CMB data from the Planck satellite

Journal Article · Sun Jun 15 00:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.123005· OSTI ID:21205149

Urrestilla, Jon; Mukherjee, Pia; Liddle, Andrew R; Hindmarsh, Mark; Kunz, Martin ^[1]; Bevis, Neil ^[2]

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1. Department of Physics and Astronomy, University of Sussex, Brighton, BN1 9QH (United Kingdom)
2. Theoretical Physics, Blackett Laboratory, Imperial College, London, SW7 2BZ (United Kingdom)

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 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.

• OSTI ID: 21205149
• Journal Information: Physical Review. D, Particles Fields, Vol. 77, Issue 12; Other Information: DOI: 10.1103/PhysRevD.77.123005; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DISTURBANCES
FOCUSING
INFLATION
PERTURBATION THEORY
POLARIZATION
RELICT RADIATION
STRING MODELS
TENSORS
UNIVERSE