Strong Bow Shocks: Turbulence and An Exact Self-Similar Asymptotic
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866913438847991808 |
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| author | DuPont, Marcus Gruzinov, Andrei MacFadyen, Andrew |
| author_facet | DuPont, Marcus Gruzinov, Andrei MacFadyen, Andrew |
| contents | We show that strong bow shocks are turbulent and non-universal near the head, but asymptote to a universal steady, self-similar, and analytically solvable flow in the downstream. The turbulence is essentially 3D, and has been confirmed by a 3D simulation. The asymptotic behavior is confirmed with high resolution 2D and 3D simulations of a cold uniform wind encountering both a solid spherical obstacle and stellar wind. This solution is relevant in the context of: (i) probing the kinematic properties of observed high-velocity compact bodies -- e.g., runaway stars and/or supernova ejecta blobs -- flying through the interstellar medium; and (ii) constraining stellar bow shock luminosities invoked by some quasi-periodic eruption (QPE) models. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_18080 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Strong Bow Shocks: Turbulence and An Exact Self-Similar Asymptotic DuPont, Marcus Gruzinov, Andrei MacFadyen, Andrew High Energy Astrophysical Phenomena Fluid Dynamics We show that strong bow shocks are turbulent and non-universal near the head, but asymptote to a universal steady, self-similar, and analytically solvable flow in the downstream. The turbulence is essentially 3D, and has been confirmed by a 3D simulation. The asymptotic behavior is confirmed with high resolution 2D and 3D simulations of a cold uniform wind encountering both a solid spherical obstacle and stellar wind. This solution is relevant in the context of: (i) probing the kinematic properties of observed high-velocity compact bodies -- e.g., runaway stars and/or supernova ejecta blobs -- flying through the interstellar medium; and (ii) constraining stellar bow shock luminosities invoked by some quasi-periodic eruption (QPE) models. |
| title | Strong Bow Shocks: Turbulence and An Exact Self-Similar Asymptotic |
| topic | High Energy Astrophysical Phenomena Fluid Dynamics |
| url | https://arxiv.org/abs/2401.18080 |