Realisations of type III stress-energy tensors of the Hawking-Ellis classification in scalar-tensor gravity

Autor:	Banerjee, Narayan, Faraoni, Valerio, Vanderwee, Robert, Giusti, Andrea
Rok vydání:	2023
Předmět:	General Relativity and Quantum Cosmology Mathematical Physics
Druh dokumentu:	Working Paper
Popis:	The ``ugly duckling'' of the Segr\'e-Pleba\'nski-Hawking-Ellis classification of stress-energy tensors is believed to be either impossible or extremely difficult to realise in Einstein gravity. Effective stress-energy tensors in alternative gravity offer a wider range of possibilities. We report a class of type III realisations in ``first-generation'' scalar-tensor and in Horndeski gravity, and their physical interpretation. The ugly duckling may be a freak of nature of limited importance but it is not physically impossible. Comment: Added explanation and an appendix, bibliography expanded. Matches version to appear in Phys. Rev. D
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2307.13846 Zobrazit plný text záznamu View this record from Arxiv