On the Applicability of κ-distributions

On the Applicability of κ-distributions
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DOI:
10.3847/1538-4357/ab2df9
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发表时间:
2019-06
期刊:
The Astrophysical Journal
影响因子:
--
通讯作者:
K. Scherer;H. Fichtner;H. Fahr;M. Lazar
K. Scherer;H. Fichtner;H. Fahr;M. Lazar
中科院分区:
其他
文献类型:
--
作者:
K. Scherer;H. Fichtner;H. Fahr;M. Lazar

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标准(非相对论)κ分布被广泛用于数据拟合和描述宏观热力学行为,例如,压力(温度)作为分布函数的二阶矩。与麦克斯韦分布不同的是,对于较小的相关值κ<2,来自速度超过光速的不切实际的超光速粒子的压力存在显著但非物理的贡献。对于熵,也存在类似的担忧。我们在这里证明,通过使用最近引入的正则化κ分布,可以避免这种非物理行为。
The standard (nonrelativistic) κ-distribution is widely used to fit data and to describe macroscopic thermodynamical behavior, e.g., the pressure (temperature) as the second moment of the distribution function. By contrast to a Maxwellian distribution, for small relevant values κ < 2 there exists a significant, but unphysical contribution to the pressure from unrealistic, superluminal particles with speeds exceeding the speed of light. Similar concerns exist for the entropy. We demonstrate here that by using the recently introduced regularized κ-distribution one can avoid such unphysical behavior.