A new perspective on galactic dynamics
arXiv:1904.08209
Abstract
We derive the radial acceleration of stars in galaxies by using basic features of thermodynamics, statistical mechanics and general relativity. We assume that the "dark" component of the radial acceleration is originated from the reaction of dark energy to the presence of baryonic matter. It can be also explained as the macroscopic manifestation of a huge number of extremely soft bosonic excitations of the dark energy medium with wavelength larger than the size of the cosmological horizon, in thermal equilibrium with de Sitter spacetime. Our formula agrees with the phenomenological relation proposed by McGaugh et al. which, in turns, fits a large amount of observational data and with the MOND theory. We also show that our formula appears as the weak field limit of Einstein's general relativity sourced by an anisotropic fluid.
5 pages, no figures, letter
References in corpus (10)
- Too big to fail? The puzzling darkness of massive Milky Way subhaloes
- The Radial Acceleration Relation in Rotationally Supported Galaxies
- MOND theory
- Effective Fluid Description of the Dark Universe
- Testing Verlinde's Emergent Gravity with the Radial Acceleration Relation
- A historical perspective on Modified Newtonian Dynamics
- MOND as a regime of quantum gravity
- Emergent gravity in galaxies and in the Solar System
- A note on a covariant version of Verlinde's emergent gravity
- Perspective on MOND emergence from Verlinde's "emergent gravity" and its recent test by weak lensing