What Is the Price of Abandoning Dark Matter? Cosmological Constraints on Alternative Gravity Theories.

@article{Pardo2020WhatIT,
  title={What Is the Price of Abandoning Dark Matter? Cosmological Constraints on Alternative Gravity Theories.},
  author={Kris Pardo and David N. Spergel},
  journal={Physical review letters},
  year={2020},
  volume={125 21},
  pages={
          211101
        }
}
Any successful alternative gravity theory that obviates the need for dark matter must fit our cosmological observations. Measurements of microwave background polarization trace the large-scale baryon velocity field at recombination and show very strong O(1) baryon acoustic oscillations. Measurements of the large-scale structure of galaxies at low redshift show much weaker features in the spectrum. If the alternative gravity theory's dynamical equations for the growth rate of structure are… Expand

Figures from this paper

Could dark matter be a natural consequence of a dynamical universe
We construct the gravitating mass of an isolated composite system on asymptotically-flat spacetimes within conventional general relativity and investigate when this quantity is well defined. ForExpand
Newtonian Fractional-Dimension Gravity and MOND
This paper introduces a possible alternative model of gravity based on the theory of fractional-dimension spaces and its applications to Newtonian gravity. In particular, Gauss's law for gravity asExpand
Living on the Fermi Edge: On Baryon Transport and Fermi Condensation
The transfer function of the baryon power spectrum from redshift z ≈ 1100 to today has recently been, for the first time, determined from data by Pardo and Spergel. We observe a remarkableExpand
Barred spiral galaxies in modified gravity theories
When bars form within galaxy formation simulations in the standard cosmological context, dynamical friction with dark matter (DM) causes them to rotate rather slowly. However, almost all observedExpand
Concerning the Origin of the Spacetime with Regard to a Multi-rest States Physical Structure
In this paper, we investigate the ontological hypothesis, which implies that the spacetime is not the ultimate structure in our universe, and its existence emerges from a deeper physical entity. ByExpand
Near future MeV telescopes can discover asteroid-mass primordial black hole dark matter
Anupam Ray ID , a Ranjan Laha ID , b Julian B. Muñoz ID , c and Regina Caputo ID 4, d Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India Centre for High Energy Physics,Expand
On filaments, prolate halos and rotation curves
We propose a simple geometrical mechanism for the flattening of galactic rotation curves, the local compression of field lines around their planes induced either by the presence of thin string-likeExpand

References

SHOWING 1-10 OF 86 REFERENCES
Detection of weak gravitational lensing distortions of distant galaxies by cosmic dark matter at large scales
TLDR
The detection of cosmic shear on angular scales of up to half a degree is reported using 145,000 galaxies and along three separate lines of sight and it is found that the dark matter is distributed in a manner consistent with either an open universe, or a flat universe that is dominated by a cosmological constant. Expand
Measuring the duration of last scattering
The cosmic microwave background (CMB) fluctuations effectively measure the basic properties of the universe during the recombination epoch. CMB measurements fix the distance to the surface of lastExpand
Testing general relativity in cosmology
TLDR
The review aims at providing an overall picture of the subject and an entry point to students and researchers interested in joining the field and a quick reference to recent results and constraints on testing gravity at cosmological scales. Expand
Cosmic background radiation anisotropies in universes dominated by nonbaryonic dark matter
Detailed calculations of the temperature fluctuations in the cosmic background radiation for universes dominated by massive collisionless relics of the big bang are presented. An initially adiabaticExpand
Confrontation of Modified Newtonian Dynamics Predictions with Wilkinson Microwave Anisotropy Probe First Year Data
I present a model devoid of nonbaryonic cold dark matter (CDM) that provides an acceptable fit to the Wilkinson Microwave Anisotropy Probe (WMAP) data for the power spectrum of temperatureExpand
Small scale entropy and adiabatic density perturbations — Antimatter in the Universe
Fluctuations of all scales are equally interesting from the point of view of the characteristics of the singular state and not only those which led to the formation of astronomical objects such asExpand
THE REAL PROBLEM WITH MOND
Gravitational potentials in the cosmos are deeper than expected from observed visible objects, a phenomenon usually attributed to dark matter, presumably in the form of a new fundamental particle.Expand
Confrontation of MOND Predictions with WMAP First Year Data
I present a model devoid of non-baryonic cold dark matter (CDM) which provides an acceptable fit to the WMAP data for the power spectrum of temperature fluctuations in the cosmic background radiationExpand
Standard sirens with a running Planck mass
We consider the effect of a time-varying Planck mass on the propagation of gravitational waves (GWs). A running Planck mass arises naturally in several modified gravity theories, and here we focus onExpand
First year Wilkinson Microwave Anisotropy Probe (WMAP) observations: Determination of cosmological parameters
WMAP precision data enable accurate testing of cosmological models. We find that the emerging standard model of cosmology, a flat � -dominated universe seeded by a nearly scale-invariant adiabaticExpand
...
1
2
3
4
5
...