毫米和百万秒差距尺度上的密度涨落
Density fluctuations on mm and Mpc scales
摘要：
在本文中，我们将报告密度波动功率与波数之间的小（mm）和大（Mpc）尺度上的相似性。小规模的测量在聚变等离子体中进行，并与经典流体湍流理论的预测进行比较。该数据与二维湍流耗散范围一致。或者，结果可以拟合到不能用湍流理论解释的函数形式。大尺度测量是斯隆数字巡天星系红移检查的一部分。我们发现，方程描述的融合等离子体也适用于星系的数据。在聚变等离子体和星系中，密度涨落功率对波数的依赖性可能表明这些涨落的共同起源。
英文摘要：
We will in this paper report on suggestive similarities between density fluctuation power versus wavenumber on small (mm) and large (Mpc) scales. The small scale measurements were made in fusion plasmas and compared to predictions from classical fluid turbulence theory. The data is consistent with the dissipative range of 2D turbulence. Alternatively, the results can be fitted to a functional form that can not be explained by turbulence theory. The large scale measurements were part of the Sloan Digital Sky Survey galaxy redshift examination. We found that the equations describing fusion plasmas also hold for the galaxy data. The comparable dependency of density fluctuation power on wavenumber in fusion plasmas and galaxies might indicate a common origin of these fluctuations.
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