Diffusive shock acceleration in relativistic, oblique shocks Article Swipe
Allard Jan van Marle
,
Artem Bohdan
,
Anabella Araudo
,
Fabien Casse
,
Alexandre Marcowith
·
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2407.05847
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2407.05847
Cosmic rays are charged particles that are accelerated to relativistic speeds by astrophysical shocks. Numerical models have been successful in confirming the acceleration process for (quasi-)parallel shocks, which have the magnetic field aligned with the direction of the shock motion. However, the process is less clear when it comes to (quasi-)perpendicular shocks, where the field makes a large angle with the shock-normal. For such shocks, the angle between the magnetic field and flow ensures that only highly energetic particles can travel upstream at all, reducing the upstream current. This process is further inhibited for relativistic shocks, since the shock can become superluminal when the required particle velocity exceeds the speed of light, effectively inhibiting any upstream particle flow. In order to determine whether such shocks can accelerate particles, we use the particle-in-cell (PIC) method to determine what fraction of particles gets reflected initially at the shock. We then use this as input for a new simulation that combines the PIC method with grid-based magnetohydrodynamics to follow the acceleration (if any) of the particles over a larger time-period in a two-dimensional grid. We find that quasi-perpendicular, relativistic shocks are capable of accelerating particles through the DSA process, provided that the shock has a sufficiently high Alfvenic Mach number.
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Metadata
- Type
- preprint
- Language
- en
- Landing Page
- https://doi.org/10.48550/arxiv.2407.05847
- OA Status
- green
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4400481254
All OpenAlex metadata
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https://openalex.org/W4400481254Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.48550/arxiv.2407.05847Digital Object Identifier
- Title
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Diffusive shock acceleration in relativistic, oblique shocksWork title
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preprintOpenAlex work type
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enPrimary language
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2024Year of publication
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2024-07-08Full publication date if available
- Authors
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Allard Jan van Marle, Artem Bohdan, Anabella Araudo, Fabien Casse, Alexandre MarcowithList of authors in order
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https://doi.org/10.48550/arxiv.2407.05847Publisher landing page
- Open access
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YesWhether a free full text is available
- OA status
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greenOpen access status per OpenAlex
- OA URL
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https://doi.org/10.48550/arxiv.2407.05847Direct OA link when available
- Concepts
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Shock (circulatory), Acceleration, Oblique case, Oblique shock, Physics, Mechanics, Classical mechanics, Shock wave, Linguistics, Philosophy, Medicine, Internal medicineTop concepts (fields/topics) attached by OpenAlex
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0Total citation count in OpenAlex
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10Other works algorithmically related by OpenAlex
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