A Heliosheath Model for the Origin of the CMB Quadrupole Moment

Abstract

A non-cosmological origin for the CMB quadrupole moment is suggested in this paper. Geometric distortions to an otherwise isotropic CMB could be imprinted on the CMB radiation as it propagates through the asymmetric termination shock formed at the boundary of the solar wind and the local interstellar medium. In addition to this boundary distortion, the Voyager spacecraft observed abrupt changes in plasma properties and rapidly fluctuating magnetic and electric fields as they recently crossed the termination shock and entered the heliosheath. Several mechanisms are discussed which could potentially imprint the termination shock distortion on the CMB. Temporal variations of this distortion due to solar wind pressure wind changes could manifest in the multipole moments of the CMB. Speculations are presented for the effect of heliosheath radiative and dynamical processes on the observed small-scale angular power spectrum of the CMB.

arXiv comment4 pages Comments Welcomed!

References in corpus (5)

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• Three Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Polarization Analysis
• Modeling of the heliospheric interface: multi-component nature of the heliospheric plasma
• Significant foreground unrelated non-acoustic anisotropy on the one degree scale in WMAP 5-year observations
• Heliosheath Synchrotron Radiation As A Possible Source For The Arcade 2 CMB Distortions