Alternatives to dark matter and dark energy

By P. Mannheim. 2005

396 citations recorded by the source corpus.

Abstract We review the underpinnings of the standard Newton–Einstein theory of gravity, and identify where it could possibly go wrong. In particular, we discuss the logical independence from each other of the general covariance principle, the equivalence principle and the Einstein equations, and discuss how to constrain the matter energy–momentum tensor which serves as the source of gravity. We identify the a priori assumption of the validity of standard gravity on all distance scales as the root cause of the dark matter and dark energy problems, and discuss how the freedom currently present in gravitational theory can enable us to construct candidate alternatives to the standard theory in which the dark matter and dark energy problems could then be resolved. We identify three generic aspects of these alternate approaches: that it is a universal acceleration scale which determines when a luminous Newtonian expectation is to fail to fit data, that there is a global cosmological effect on local galactic motions which can replace galactic dark matter, and that to solve the cosmological constant problem it is not necessary to quench the cosmological constant itself, but only the amount by which it gravitates.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/aad05f1dc377cbaf529e8b00e5535e9b6d2b6d7d

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In Astronomy and Astrophysics

Citations in the corpus

A Class of Elementary Particle Models Without Any Adjustable Real Parameters (2011, background): “Authors of [12–18] made some brave attempts, but we note that”
The Hubble Diagram to Redshift >6 from 69 Gamma-Ray Bursts (2006, background): “Many alternatives to the concordance (w ¼ 1) case have been proposed, including Weyl gravity (Mannheim 2006) andmany versions of quintessence (Szydyowski et al. 2006), and at this point there is no strong reason to prefer the concordance.”
Photon and graviton mass limits (2008, background): “Mannheim (247) has written an accessible survey of the subject, beginning with reports in the 1930s of anomalies that could be taken as evidence for dark matter, and including a number of later observational and theoretical works.52 Especially noteworthy is the work by Mannheim and colleagues (247) ”