On the invariant symmetries of the D-metrics
On the invariant symmetries of the D-metrics
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关于 D 度量的不变对称性
DOI:
10.1063/1.2799264
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发表时间:
2007
影响因子:
1.3
通讯作者:
J. A. S'aez
中科院分区:
文献类型:
--
作者:
J. J. Ferrando;J. A. S'aez
We analyze the symmetries and other invariant qualities of the D-metrics (type D aligned Einstein-Maxwell solutions with cosmological constant whose Debever null principal directions determine shear-free geodesic null congruences). We recover some properties and deduce new ones about their isometry group and about their quadratic first integrals of the geodesic equation, and we analyze when these invariant symmetries characterize the family of metrics. We show that the subfamily of the Kerr-NUT solutions are those admitting a Papapetrou field aligned with the Weyl tensor.