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Title: Scale-dependent CMB asymmetry from primordial configuration

We demonstrate that a topological defect can explain the hemispherical power asymmetry of the CMB. The first point is that a defect configuration, which already exists prior to inflation, can source asymmetry of the CMB. The second point is that modulation mechanisms, such as the curvaton and other modulation mechanisms, can explain scale-dependence of the asymmetry. Using a simple analysis of the δ N formalism, we show models in which scale-dependent hemispherical power asymmetry is explained by primordial configuration of a defect.
Authors:
 [1] ;  [2] ;  [3]
  1. Cosmophysics group, Theory Center, IPNS, KEK, and The Graduate University for Advanced Study (Sokendai), Tsukuba 305-0801 (Japan)
  2. Department of Physics, Chuo University, Bunkyo-ku, Tokyo 112 (Japan)
  3. Laboratory of Physics, Saitama Institute of Technology, Fukaya, Saitama 369-0293 (Japan)
Publication Date:
OSTI Identifier:
22373405
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 08; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ASYMMETRY; COSMOLOGICAL INFLATION; DEFECTS; MODULATION; TOPOLOGY