Evolving dark energy or dark matter with an evolving equation-of-state?

IF 5.3 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-07-17 DOI:10.1088/1475-7516/2025/07/059

Xingang Chen and Abraham Loeb

引用次数: 0

Abstract

We show that the latest empirical constraints on cosmology, from a combination of DESI, CMB and supernova data, can be accounted for if a small component of dark matter has an evolving and oscillating equation of state within -1 < w < 1. From a fundamental physics perspective, this interpretation is more appealing than an evolving phantom dark energy with w < -1, which violates the null energy condition.

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不断演化的暗能量或状态方程不断演化的暗物质？

我们表明，如果暗物质的一小部分在-1 < w < 1范围内具有演化和振荡的状态方程，则可以解释来自DESI， CMB和超新星数据组合的最新宇宙学经验约束。从基础物理学的角度来看，这种解释比w < -1的不断发展的幽灵暗能量更有吸引力，后者违反了零能条件。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Cosmology and Astroparticle Physics 地学天文-天文与天体物理

CiteScore

10.20

自引率

23.40%

发文量

632

审稿时长

1 months

期刊介绍： Journal of Cosmology and Astroparticle Physics (JCAP) encompasses theoretical, observational and experimental areas as well as computation and simulation. The journal covers the latest developments in the theory of all fundamental interactions and their cosmological implications (e.g. M-theory and cosmology, brane cosmology). JCAP''s coverage also includes topics such as formation, dynamics and clustering of galaxies, pre-galactic star formation, x-ray astronomy, radio astronomy, gravitational lensing, active galactic nuclei, intergalactic and interstellar matter.