Fully relativistic treatment of light neutrinos in $N$-body simulations
| Autor: | Steen Hannestad, Jeppe Dakin, Thomas Tram, Jacob Brandbyge |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
dark matter simulations Cosmology and Nongalactic Astrophysics (astro-ph.CO) Linear perturbation theory cosmological neutrinos 010308 nuclear & particles physics General relativity Formalism (philosophy) Numerical analysis Equations of motion FOS: Physical sciences Astronomy and Astrophysics neutrino masses from cosmology 01 natural sciences Massless particle Theoretical physics High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences Newtonian fluid Neutrino Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Tram, T, Brandbyge, J, Dakin, J & Hannestad, S 2019, ' Fully relativistic treatment of light neutrinos in N-body simulations ', Journal of Cosmology and Astroparticle Physics, vol. 2019, no. 3, 022 . https://doi.org/10.1088/1475-7516/2019/03/022 |
| DOI: | 10.1088/1475-7516/2019/03/022 |
| Popis: | Cosmological $N$-body simulations are typically purely run with particles using Newtonian equations of motion. However, such simulations can be made fully consistent with general relativity using a well-defined prescription. Here, we extend the formalism previously developed for $\Lambda$CDM cosmologies with massless neutrinos to include the effects of massive, but light neutrinos. We have implemented the method in two different $N$-body codes, CONCEPT and PKDGRAV, and demonstrate that they produce consistent results. We furthermore show that we can recover all appropriate limits, including the full GR solution in linear perturbation theory at the per mille level of precision. Comment: 11 pages, 4 figures |
| Databáze: | OpenAIRE |
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