CMB四极矩起源的日鞘模型
A Heliosheath Model for the Origin of the CMB Quadrupole Moment
摘要：
本文提出了CMB四极矩的非宇宙学起源。当CMB辐射通过太阳风和当地星际介质边界处形成的非对称终止激波传播时，对其他各向同性CMB的几何畸变可能会印在CMB辐射上。除了这种边界扭曲，旅行者号宇宙飞船还观测到等离子体特性的突然变化以及磁场和电场的快速波动，因为它们最近穿过了终端激波并进入了日鞘。几种机制进行了讨论，这可能会留下深刻的终止激波上的CMB扭曲。由于太阳风压力风的变化，这种扭曲的时间变化可以体现在CMB的多极矩。推测日鞘辐射和动力学过程对观测到的小尺度角功率谱的CMB的效果。
英文摘要：
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.
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