Seeking Dark Signals in Oscillating Redshifts: Exploring Geometric Scalar Field Dark Matter

TL;DR

This paper proposes a geometric torsion model for scalar field dark matter predicting oscillations in cosmological redshifts, and analyzes existing data to search for these signals, finding no strong evidence but setting constraints.

Contribution

It introduces a new geometric torsion model for scalar field dark matter predicting observable redshift oscillations and tests it against existing spectroscopic data.

Findings

No compelling evidence for predicted redshift oscillations in OzDES data

Some candidate frequencies identified, warranting further study

Constraints placed on the model's free parameters

Abstract

We detail a novel theoretical prediction that a geometric torsion model for scalar field dark matter could lead to oscillations, on readily probeable timescales, in the time evolution of cosmological redshifts of astronomical sources with qualitatively distinct behavior at different redshift scales (larger or smaller than z ~ 0.1). We present an analysis of extant spectroscopy data from the Australian Dark Energy Survey (OzDES) to assess whether such signals are present across a wide array of cosmological sources and baseline redshifts on the six-year timescale of OzDES. While a simple Fourier analysis of redshift variations weakly identifies some candidate frequencies, and so further investigation with future cosmological data sets may be warranted, we have not found compelling empirical evidence for the theory under consideration in this data set, placing tentative constraints on its free parameters.