Cosmic acceleration and varying alpha in anisotropic universe

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• 作者：H. Farajollahi ; F. Tayebi
• 关键词：Cosmology ; BSBM theory ; Anisotropy ; Bianchi Model
• 刊名：Astrophysics and Space Science
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：357
• 期：2
• 全文大小：875 KB
• 参考文献：Ade, P., et?al. (Planck Collaboration): (2013). arXiv:-303.-076
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• 作者单位：H. Farajollahi (1) (2)
  F. Tayebi (1)
  
  1. Department of Physics, University of Guilan, Rasht, Iran
  2. School of Physics, University of New South Wales, Sydney, NSW, 2052, Australia
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Astronomy
  
• 出版者：Springer Netherlands
• ISSN：1572-946X

文摘

Recent observational constraints from the Planck and Wilkinson Microwave Anisotropy Probe (WMAP) indicate tiny temperature anisotropies and some large angle anomalies in the Cosmic Microwave Background (CMB). These anisotropies may originated from an anisotropic geometric background, the matter distribution or both. In this paper we assume a homogeneous and anisotropic Bianchi type-I universe subject to variation of the fine structure constant, α, in the Bekenstein-Sandvik-Barrow-Magueijo (BSBM) theory (Sandvik et?al. in Phys. Rev. Lett. 88:031302, 2002). By performing stability analysis, the anisotropic cosmic attractors are studied. The outcome confirms small anisotropies in an accelerating cosmic expansion. The result also predicts a larger variation of fine structure constant in an decelerating universe in future.