论文标题
将散装粘度解释为广义的Chaplygin气体
Interpretation of bulk viscosity as the generalized Chaplygin gas
论文作者
论文摘要
宇宙学的观察表明，当前加速的宇宙应以异国情调的物质形式填补，违反了强大的能量条件，未知的性质和起源。我们提出了加速源的粘性暗物质，以chapllygin气体的形式，其特征是现象学形式的状态方程$ p = - \ frac {a} {ρ^α} $，其中$ p $和$ p $和$ p $和$ p $是压力和能量密度和能量密度（$ a $ a $ a $ a $ a $ a $ a $ a $ constants）。 Chaplygin气体是用粘性物质来解释的，没有宇宙常数。加速效应仅由这类宇宙学模型中的粘度引起。我们表明，引入标准FRW宇宙学引入的大量粘度效应引起了暗物质和暗能量的自然统一。我们表明，如果$ m <1/2 $（$ 1+α= 1/2-m $），则尘埃粘性宇宙学模型在结构上是稳定的。
The cosmological observations suggest that the presently accelerating universe should be filled by an exotic form of matter, violating the strong energy condition, of unknown nature and origin. We propose the viscous dark matter of a source of acceleration in the form of Chaplygin gas which is characterized by equation of state in the phenomenological form $p=-\frac{A}{ρ^α}$, where $p$ and $ρ$ are pressure and energy density respectively ($A$ and $α$ are constants). Chaplygin gas is interpreted in terms of viscous matter and without the cosmological constant. The acceleration effect is caused only by viscosity in this class of cosmological models. We show that bulk viscosity effects introduced to the standard FRW cosmology give rise to the natural unification of both dark matter and dark energy. We show that dust viscous cosmological models are structurally stable if $m < 1/2$ ($1+α=1/2-m$).
