English

Is non-particle dark matter equation of state parameter evolving with time?

General Physics 2021-08-18 v1

Abstract

Recently, the so-called Hubble Tension, i.e. the mismatch between the local and the cosmological measurements of the Hubble parameter, has been resolved when non-particle dark matter is considered which has a negative equation of state parameter (ω0.01\omega \approx -0.01). We investigate if such a candidate can successfully describe the galactic flat rotation curves. It is found that the flat rotation curve feature puts a stringent constraint on the dark matter equation of state parameter ω\omega and ω0.01\omega \approx -0.01 is not consistent with flat rotational curves, observed around the galaxies. However, a dynamic ω\omega of non-particle dark matter may overcome the Hubble tension without affecting the flat rotation curve feature.

Keywords

Cite

@article{arxiv.2108.04686,
  title  = {Is non-particle dark matter equation of state parameter evolving with time?},
  author = {Souvik Ghose and Arunabha Bhadra},
  journal= {arXiv preprint arXiv:2108.04686},
  year   = {2021}
}

Comments

6 pages, 1 figure, Accepted for publication in EPJC

R2 v1 2026-06-24T04:59:26.704Z