Characteristics of Effective Dark Matter in Nonlocal Gravity
arXiv:2201.12852 · doi:10.3847/1538-4357/ac75d6
Abstract
Nonlocal gravity (NLG) is a classical nonlocal generalization of Einstein's theory of gravitation that has been constructed in close analogy with the nonlocal electrodynamics of media. According to NLG, what appears as dark matter in astrophysics and cosmology is in reality the nonlocal aspect of the universal gravitational interaction. We focus here on two main features of the effective dark matter in NLG, namely, (a) the density of effective dark matter in NLG is always finite and therefore cusp-free, and (b) there is less effective dark matter in dwarf galaxies than is generally assumed in the standard particle dark matter paradigm. The corresponding astrophysical implications of NLG in connection with three ultra-diffuse galaxies AGC 114905, 242019, and 219533 are discussed.
Comments: 25 pages, 3 figures, 1 table; v2: subsections added to section V, presentation improved; v3: amended version to appear in ApJ
References in corpus (11)
- Nonlocal Gravity Simulates Dark Matter
- A formal framework for a nonlocal generalization of Einstein's theory of gravitation
- Robust HI kinematics of gas-rich ultra-diffuse galaxies: hints of a weak-feedback formation scenario
- A trail of dark matter-free galaxies from a bullet dwarf collision
- A Tip of the Red Giant Branch Distance of Mpc to the Dark Matter Deficient Galaxy NGC1052-DF2 from 40 Orbits of Hubble Space Telescope Imaging
- A cuspy dark matter halo
- Orbital evidences for dark-matter-free Milky Way dwarf spheroidal galaxies
- Barred spiral galaxies in modified gravity theories
- Fornax globular cluster distributions: implications for the cusp-core problem
- Dynamical Friction in Nonlocal Gravity
- The Baryonic Tully-Fisher Relation in the Local Group and the Equivalent Circular Velocity of Pressure Supported Dwarfs