2020/10/27 by Jhonny A. Agudelo Ruiz, Jhonny A. A. Ruiz, Ruiz, Jhonny A. A.
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #astro-ph.CO #gr-qc
paper · pdf · doi:10.48550/arxiv.2010.14488
19 pages, 3 figures. New comments added. Accepted for publication in The European Physical Journal Plus
openalex publication_date 2020/10/27 · arxiv created 2020/11/20 · arxiv updated 2020/11/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The warm dark matter (WDM) can be described by simple and useful model called reduced relativistic gas (RRG). In this work, it is analytically constructed the scalar field actions minimally and non-minimally coupled to gravity, which are equivalent to RRG in the sense they produce the same cosmological solutions for the conformal factor of the metric. In particular, we construct the scalar theory which corresponds to the model of ultra-relativistic ideal gas of spinless particles possessing conformal symmetry. Finally, the possibility of supplementing our scalar field model with a dynamical dark energy in the form of a running cosmological constant (RCC) is also considered.