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Finsler space-time can explain both parity asymmetry and power deficit seen in CMB temperature anisotropies

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  • معلومة اضافية
    • Publisher Information:
      2018-06-29
    • نبذة مختصرة :
      We propose a framework of Finsler space-time to explain the observed parity asymmetry and the power deficit in the low-$\ell$ ($2\leqslant \ell \leqslant 29$) multipole range of cosmic microwave background (CMB) temperature anisotropies. In the $3+1$ dimensional space-time, the three-dimensional space is described by a Randers-Finsler space, which is spatially irreversible, inducing the parity asymmetry in the CMB angular power spectrum. We estimate the constraints on the two parameters introduced by Finsler space-time via analyzing the low-$\ell$ angular power spectrum in PLANCK 2015 CMB temperature data. We see that the low-$\ell$ power suppression in the CMB temperature anisotropies can also be resolved in this scenario. Our study shows that the two low-$\ell$ anomalies, i.e., parity asymmetry and power deficit, may have a common origin.
      Comment: 5 pages, 2 figures. Accepted for publication in MNRAS
    • الموضوع:
      Astrophysics - Cosmology and Nongalactic Astrophysics; text
    • الرقم المعرف:
      10.1093.mnras.sty1689
    • Other Numbers:
      COO oai:arXiv.org:1806.11425
      doi:10.1093/mnras/sty1689
      1098135193
    • Contributing Source:
      CORNELL UNIV
      From OAIster®, provided by the OCLC Cooperative.
    • الرقم المعرف:
      edsoai.on1098135193
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