Testing Lorentz invariance of dark matter with satellite galaxies
We develop the framework for testing Lorentz invariance in the dark matter sector using galactic dynamics. We consider a Lorentz violating (LV) vector field acting on the dark matter component of a satellite galaxy orbiting in a host halo. We introduce a numerical model for the dynamics of satellite...
Gespeichert in:
| 1. Verfasser: | |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
11 May 2017
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| In: |
Journal of cosmology and astroparticle physics
Year: 2017, Heft: 5, Pages: ? |
| ISSN: | 1475-7516 |
| DOI: | 10.1088/1475-7516/2017/05/024 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1088/1475-7516/2017/05/024 Verlag, Volltext: http://stacks.iop.org/1475-7516/2017/i=05/a=024 
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| Verfasserangaben: | Dario Bettoni, Adi Nusser, Diego Blas, Sergey Sibiryakov |
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| 520 | |a We develop the framework for testing Lorentz invariance in the dark matter sector using galactic dynamics. We consider a Lorentz violating (LV) vector field acting on the dark matter component of a satellite galaxy orbiting in a host halo. We introduce a numerical model for the dynamics of satellites in a galactic halo and for a galaxy in a rich cluster to explore observational consequences of such an LV field. The orbital motion of a satellite excites a time dependent LV force which greatly affects its internal dynamics. Our analysis points out key observational signatures which serve as probes of LV forces. These include modifications to the line of sight velocity dispersion, mass profiles and shapes of satellites. With future data and a more detailed modeling these signatures can be exploited to constrain a new region of the parameter space describing the LV in the dark matter sector. | ||
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