Testing Lorentz invariance of dark matter with satellite galaxies

• Verfasst von: Bettoni, Dario [VerfasserIn]
• Titel: Testing Lorentz invariance of dark matter with satellite galaxies
• Verf.angabe: Dario Bettoni, Adi Nusser, Diego Blas, Sergey Sibiryakov
• E-Jahr: 2017
• Jahr: 11 May 2017
• Fussnoten: Gesehen am 06.12.2019
• Titel Quelle: Enthalten in: Journal of cosmology and astroparticle physics
• Ort Quelle: London : IOP, 2003
• Jahr Quelle: 2017
• Band/Heft Quelle: (2017), 5, Artikel-ID 024, Seite ?
• ISSN Quelle: 1475-7516
• DOI: doi:10.1088/1475-7516/2017/05/024
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1576269310

Abstract

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.