Magnetic fields during high redshift structure formation
We explore the amplification of magnetic fields in the high-redshift Universe. For this purpose, we perform high-resolution cosmological simulations following the formation of primordial halos with ∼ ⊙ 107 M, revealing the presence of turbulent structures and complex morphologies at resolutions of a...
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| Main Authors: | , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2013 Jul 1
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| In: |
Astronomische Nachrichten
Year: 2013, Volume: 334, Issue: 6, Pages: 531-536 |
| ISSN: | 1521-3994 |
| DOI: | 10.1002/asna.201211898 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1002/asna.201211898 Verlag, lizenzpflichtig, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/asna.201211898 
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| Author Notes: | D.R.G. Schleicher, M. Latif, J. Schober, W. Schmidt, S. Bovino, C. Federrath, J. Niemeyer, R. Banerjee, and R.S. Klessen |
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| 520 | |a We explore the amplification of magnetic fields in the high-redshift Universe. For this purpose, we perform high-resolution cosmological simulations following the formation of primordial halos with ∼ ⊙ 107 M, revealing the presence of turbulent structures and complex morphologies at resolutions of at least 32 cells per Jeans length. Employing a turbulence subgrid-scale model, we quantify the amount of unresolved turbulence and show that the resulting turbulent viscosity has a significant impact on the gas morphology, suppressing the formation of low-mass clumps. We further demonstrate that such turbulence implies the efficient amplification of magnetic fields via the small-scale dynamo. We discuss the properties of the dynamo in the kinematic and non-linear regime, and explore the resulting magnetic field amplification during primordial star formation. We show that field strengths of ∼ 10-5 G can be expected at number densities of ∼ 5 cm-3. (© 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) | ||
| 650 | 4 | |a cosmology: theory | |
| 650 | 4 | |a galaxies: formation | |
| 650 | 4 | |a magnetic fields | |
| 650 | 4 | |a turbulence | |
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| 700 | 1 | |a Schmidt, W. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Bovino, S. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Federrath, C. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Niemeyer, J. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Banerjee, R. |e VerfasserIn |4 aut | |
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