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General Relativity and Quantum Cosmology

arXiv:2410.24161 (gr-qc)
[Submitted on 31 Oct 2024 (v1), last revised 16 Jan 2025 (this version, v2)]

Title:Ergoregion instability in a fluid with vorticity

Authors:Leandro A. Oliveira, Carolina L. Benone, Luís C. B. Crispino
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Abstract:We investigate perturbations in a rotational and incompressible fluid flow. Interested in the phenomenon analogous to the black hole ergoregion instability, we verify the influence of the vorticity in the instability associated with this fluid system, in the presence of a region in which the fluid flow velocity is greater than the speed of the perturbation. With this aim, we compute the quasinormal modes of the system, using two different numerical methods, obtaining an excellent numerical agreement between them. We find that the vorticity tends to diminish the ergoregion instability of the system.
Comments: 10 pages, 6 figures and 2 tables
Subjects: General Relativity and Quantum Cosmology (gr-qc); Fluid Dynamics (physics.flu-dyn)
Cite as: arXiv:2410.24161 [gr-qc]
  (or arXiv:2410.24161v2 [gr-qc] for this version)
  https://doi.org/10.48550/arXiv.2410.24161
Journal reference: Phys. Rev. D 110 (2024) 124047
Related DOI: https://doi.org/10.1103/PhysRevD.110.124047

Submission history

From: Carolina Benone [view email]
[v1] Thu, 31 Oct 2024 17:19:45 UTC (632 KB)
[v2] Thu, 16 Jan 2025 12:48:18 UTC (1,078 KB)
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