Averaging in LRS class II spacetimes

作者：Kaspar Petr; Svitek Otakar^*

来源：General Relativity and Gravitation, 2015, 47(2): 4.

DOI：10.1007/s10714-014-1844-6

• LRS family
• Cosmology
• Averaging

We generalize Buchert's averaged equations (Gen Relativ Gravit 32; 105, 2000; Gen Relativ Gravit 33; 1381, 2001) to LRS class II dust model in the sense that all Einstein equations are averaged, not only the trace part. We derive the relevant averaged equations and we investigate backreaction on expansion and shear scalars in an approximate LTB model. Finally we propose a way to close the system of averaged equations.

• 出版日期2015-2