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arXiv 2302.08753gr-qcastro-ph.CO
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在振荡红移中寻找暗信号:探索几何标量场暗物质

Seeking Dark Signals in Oscillating Redshifts: Exploring Geometric Scalar Field Dark Matter

James Wheeler

摘要:

我们详细介绍了一个新的理论预测,标量场暗物质的几何扭转模型可能会导致振荡,在容易探测的时间尺度上,在不同的红移尺度(大于或小于z ~ 0.1)的性质不同的行为的天文源的宇宙学红移的时间演化。我们提出了一个分析现存的光谱数据从澳大利亚暗能量调查(OzDES),以评估是否存在这样的信号在广泛的宇宙学来源和基线红移的六年时间尺度上的OzDES。虽然一个简单的傅立叶分析的红移变化微弱地识别出一些候选频率,因此未来的宇宙学数据集的进一步研究可能是必要的,我们还没有发现令人信服的经验证据,在这个数据集中考虑的理论,把它的自由参数暂时限制。

英文摘要:

We detail a novel theoretical prediction that a geometric torsion model for scalar field dark matter could lead to oscillations, on readily probeable timescales, in the time evolution of cosmological redshifts of astronomical sources with qualitatively distinct behavior at different redshift scales (larger or smaller than z ~ 0.1). We present an analysis of extant spectroscopy data from the Australian Dark Energy Survey (OzDES) to assess whether such signals are present across a wide array of cosmological sources and baseline redshifts on the six-year timescale of OzDES. While a simple Fourier analysis of redshift variations weakly identifies some candidate frequencies, and so further investigation with future cosmological data sets may be warranted, we have not found compelling empirical evidence for the theory under consideration in this data set, placing tentative constraints on its free parameters.

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