First-principles measurement of ion and electron energization in collisionless accretion flow
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866913749054521344 |
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| author | Gorbunov, Evgeny A. Bacchini, Fabio Zhdankin, Vladimir Werner, Gregory R. Begelman, Mitchell C. Uzdensky, Dmitri A. |
| author_facet | Gorbunov, Evgeny A. Bacchini, Fabio Zhdankin, Vladimir Werner, Gregory R. Begelman, Mitchell C. Uzdensky, Dmitri A. |
| contents | We present the largest 3D Particle-in-Cell shearing-box simulations of turbulence driven by the magnetorotational instability, for the first time employing the realistic proton-to-electron mass ratio. We investigate the energy partition between relativistically hot electrons and subrelativistic ions in turbulent accretion flows, a regime relevant to collisionless, radiatively inefficient accretion flows of supermassive black holes, such as those targeted by the Event Horizon Telescope. We provide a simple empirical formula to describe the measured heating ratio between ions and electrons, which can be used for more accurate global modeling of accretion flows with standard fluid approaches such as general-relativistic magnetohydrodynamics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_02872 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | First-principles measurement of ion and electron energization in collisionless accretion flow Gorbunov, Evgeny A. Bacchini, Fabio Zhdankin, Vladimir Werner, Gregory R. Begelman, Mitchell C. Uzdensky, Dmitri A. High Energy Astrophysical Phenomena Plasma Physics We present the largest 3D Particle-in-Cell shearing-box simulations of turbulence driven by the magnetorotational instability, for the first time employing the realistic proton-to-electron mass ratio. We investigate the energy partition between relativistically hot electrons and subrelativistic ions in turbulent accretion flows, a regime relevant to collisionless, radiatively inefficient accretion flows of supermassive black holes, such as those targeted by the Event Horizon Telescope. We provide a simple empirical formula to describe the measured heating ratio between ions and electrons, which can be used for more accurate global modeling of accretion flows with standard fluid approaches such as general-relativistic magnetohydrodynamics. |
| title | First-principles measurement of ion and electron energization in collisionless accretion flow |
| topic | High Energy Astrophysical Phenomena Plasma Physics |
| url | https://arxiv.org/abs/2410.02872 |