RAyMOND: an N-body and hydrodynamics code for MOND
| Autor: | Michael Fellhauer, Rory Smith, Graeme Candlish |
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| Rok vydání: | 2014 |
| Předmět: |
Physics
Cosmology and Nongalactic Astrophysics (astro-ph.CO) Cold dark matter Adaptive mesh refinement Dark matter FOS: Physical sciences Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics - Astrophysics of Galaxies Galaxy Modified Newtonian dynamics Gravitation Theoretical physics Classical mechanics Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) Stellar dynamics Phenomenology (particle physics) Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Monthly Notices of the Royal Astronomical Society Artículos CONICYT CONICYT Chile instacron:CONICYT |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/stu2158 |
| Popis: | The LCDM concordance cosmological model is supported by a wealth of observational evidence, particularly on large scales. At galactic scales, however, the model is poorly constrained and recent observations suggest a more complex behaviour in the dark sector than may be accommodated by a single cold dark matter component. Furthermore, a modification of the gravitational force in the very weak field regime may account for at least some of the phenomenology of dark matter. A well-known example of such an approach is MOdified Newtonian Dynamics (MOND). While this idea has proven remarkably successful in the context of stellar dynamics in individual galaxies, the effects of such a modification of gravity on galaxy interactions and environmental processes deserves further study. To explore this arena we modify the parallel adaptive mesh refinement code RAMSES to use two formulations of MOND. We implement both the fully non-linear aquadratic Lagrangian (AQUAL) formulation as well as the simpler quasi-linear formulation (QUMOND). The relevant modifications necessary for the Poisson solver in RAMSES are discussed in detail. Using idealised tests, in both serial and parallel runs, we demonstrate the effectiveness of the code. Comment: 11 pages, 16 figures. Accepted to MNRAS. Corrected typos |
| Databáze: | OpenAIRE |
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