A new relativistic theory for Modified Newtonian Dynamics
Constantinos Skordis, Tom Zlosnik
Abstract
We propose a relativistic gravitational theory leading to modified Newtonian dynamics, a paradigm that explains the observed universal galactic acceleration scale and related phenomenology. We discuss phenomenological requirements leading to its construction and demonstrate its agreement with the observed cosmic microwave background and matter power spectra on linear cosmological scales. We show that its action expanded to second order is free of ghost instabilities and discuss its possible embedding in a more fundamental theory.
arXiv comments
7 pages, 2 figures. We separated the CMB and MPS into two figures, displaying for each one the residuals compared to LCDM. We added more references, additional discussion and details, resulting also to structural rearrangements and shortening of text in accordance with referee comments and to fit within PRL page limits. Content matches published version
This is a surprisingly good write-up. The Skordis & Zlosnik paper can be found at https://arxiv.org/abs/2007.00082 I'll start with some comments for non-experts, and then escalate about ten paragraphs further down. tl;dr: there are lots of things that hang on General Relativity…
> There is something fundamental in the universe that we don't understand. Good! I hope there's lots of fundamental things we don't understand well yet. We can then enjoy improving our understanding. "The paper" below is https://arxiv.org/abs/2007.00082 ==…
https://arxiv.org/abs/2007.00082
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