Cosmological models with an inhomogeneous viscous dark fluid, coupled with dark matter in the Friedmann–Robertson–Walker (FRW) flat universe, are considered. The influence of thermal effects caused by Hawking radiation on the visible horizon is studied, in connection with the classified Types I and III singularities which are known to occur within a finite amount of time. Allowance of thermal effects implies that a transition to a Type II singularity can take place, in a finite time. We take into account a bulk viscosity of the dark fluid, observing the equation of state in the case of radiation, and find that there is a qualitative change in the singular universe of Type I: it may pass into a singularity of Type III, or it may avoid the singularity at all.

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热辐射对暗宇宙奇点的影响

考虑了具有不均匀粘性暗流体的宇宙学模型，以及弗里德曼-罗伯逊-沃克 (FRW) 平坦宇宙中的暗物质。结合已知在有限时间内发生的分类的 I 型和 III 型奇点，研究了霍金辐射引起的热效应对可见地平线的影响。允许热效应意味着可以在有限时间内发生向 II 型奇点的转变。我们考虑到暗流体的体积粘度，观察辐射情况下的状态方程，发现I型奇异宇宙发生了质变：它可能进入III型奇异点，或者它可以完全避免奇点。