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arXiv · 1910.08008

Decomposition of total stress-energy for the generalised Kiselev black hole

Petarpa Boonserm·Tritos Ngampitipan·Alex Simpson·Matt Visser
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Abstract

We demonstrate that the anisotropic stress-energy supporting the Kiselev black hole can be mimicked by being split into a perfect fluid component plus either an electromagnetic component or a scalar field component, thereby quantifying the precise extent to which the Kiselev black hole fails to represent a perfect fluid spacetime. The perfect fluid component carries either an electric or a scalar charge, which then generates anisotropic electromagnetic or scalar fields. This in turn generates anisotropic contributions to the stress-energy. These in turn induce forces which partially (in addition to the fluid pressure gradient) support the matter content against gravity. This decomposition is carried out both for the original 1-component Kiselev black hole and for the generalized N-component Kiselev black holes. We also comment on the presence of energy condition violations (specifically for the null energy condition --- NEC) for certain sub-classes of Kiselev black holes.

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Petarpa Boonserm, Tritos Ngampitipan, Alex Simpson, Matt Visser. 2019-10-17. Decomposition of total stress-energy for the generalised Kiselev black hole. https://doi.org/10.1103/physrevd.101.024022

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