Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2010-10-27
Phys.Rev.D83:043003,2011
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
New version has slightly reworded section III, 10 pages, 6 figures
Scientific paper
10.1103/PhysRevD.83.043003
The proposed CMBPol mission will be able to detect the imprint of topological defects on the cosmic microwave background (CMB) provided the contribution is sufficiently strong. We quantify the detection threshold for cosmic strings and for textures, and analyse the satellite's ability to distinguish between these different types of defects. We also assess the level of danger of misidentification of a defect signature as from the wrong defect type or as an effect of primordial gravitational waves. A 0.002 fractional contribution of cosmic strings to the CMB temperature spectrum at multipole ten, and similarly a 0.001 fractional contribution of textures, can be detected and correctly identified at the 3{\sigma} level. We also confirm that a tensor contribution of r = 0.0018 can be detected at over 3{\sigma}, in agreement with the CMBpol mission concept study. These results are supported by a model selection analysis.
Bevis Neil
Hindmarsh Mark
Kunz Martin
Liddle Andrew R.
Mukherjee Pia
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