Assessing the stability of ultracompact spinning boson stars with nonlinear evolutions
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866911452101607424 |
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| author | Evstafyeva, Tamara Siemonsen, Nils East, William E. |
| author_facet | Evstafyeva, Tamara Siemonsen, Nils East, William E. |
| contents | We reinvestigate the stability properties of ultracompact spinning boson stars with a stable light ring using fully nonlinear 3+1 and 2+1 numerical relativity simulations and two different formulations of the Einstein equations. We find no evidence of an instability on timescales of $t μ\sim 10^4$ (in units of the scalar mass), when allowing the star to be perturbed either solely by discretization error or by imposing various types of perturbations to our initial data. We find that the initially imposed perturbations exhibit slow decay, even for magnitudes just below the order where immediate collapse is induced. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_11527 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Assessing the stability of ultracompact spinning boson stars with nonlinear evolutions Evstafyeva, Tamara Siemonsen, Nils East, William E. General Relativity and Quantum Cosmology We reinvestigate the stability properties of ultracompact spinning boson stars with a stable light ring using fully nonlinear 3+1 and 2+1 numerical relativity simulations and two different formulations of the Einstein equations. We find no evidence of an instability on timescales of $t μ\sim 10^4$ (in units of the scalar mass), when allowing the star to be perturbed either solely by discretization error or by imposing various types of perturbations to our initial data. We find that the initially imposed perturbations exhibit slow decay, even for magnitudes just below the order where immediate collapse is induced. |
| title | Assessing the stability of ultracompact spinning boson stars with nonlinear evolutions |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2508.11527 |