Magnetic relaxation in the Bianchi-I universe
Magnetic relaxation in the Bianchi-I universe
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Bianchi-I 宇宙中的磁弛豫
DOI：
10.1088/0264-9381/24/20/018
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发表时间：
2007
影响因子：
3.5
通讯作者：
A. Balakin
中科院分区：
文献类型：
--
作者：
A. Balakin
讨论了扩展的爱因斯坦-麦克斯韦模型及其在磁化Bianci-i宇宙演化问题中的应用。介质磁化强度的演化符合弛豫型扩展本构方程。得到了扩展主方程的一系列精确解，并进行了讨论。比安奇-I宇宙的各向异性膨胀在两个主方向(沿磁场和与磁场垂直)上变得非单调(加速/减速)。当磁化有效地屏蔽了磁场时，出现了一种特殊类型的膨胀，即所谓的隐磁场演化，而后者从引力场的方程中消失了。
The extended Einstein–Maxwell model and its application to the problem of the evolution of the magnetized Bianchi-I universe are considered. The evolution of medium magnetization is governed by a relaxation type extended constitutive equation. The series of exact solutions to the extended master equations is obtained and discussed. The anisotropic expansion of the Bianchi-I universe is shown to become non-monotonic (accelerated/decelerated) in both principal directions (along the magnetic field and orthogonal to it). A specific type of expansion, the so-called evolution with hidden magnetic field, is shown to appear when the magnetization effectively screens the magnetic field and the latter disappears from the equations for the gravitational field.