Inhomogeneous space-times admitting isotropic radiation: Vorticity-free case.

Inhomogeneous space-times admitting isotropic radiation: Vorticity-free case.
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允许各向同性辐射的不均匀时空:无涡度情况。

DOI:
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发表时间:
1992
期刊:
Physical Review D, Particles and fields
影响因子:
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通讯作者:
Miquel Portilla
Miquel Portilla
中科院分区:
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文献类型:
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作者:
J. J. Ferrando;Juan Antonio Morales;Miquel Portilla

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得到了一个无涡无剪的类时同余的时空能量动量张量。这个结果被用来写爱因斯坦方程以方便的方式,以获得非均匀时空允许满足刘维尔方程的光子各向同性分布。考虑了能流方向压力各向异性的两种特殊情况
The energy-momentum tensor of space-times admitting a vorticity-free and a shear-free timelike congruence is obtained. This result is used to write Einstein equations in a convenient way in order to get inhomogeneous space-times admitting an isotropic distribution of photons satisfying the Liouville equation. Two special cases with anisotropic pressures in the energy flow direction are considered