Roles of dark energy perturbations in the dynamical dark energy models: Can we ignore them?

2009/04/30 by Chan-Gyung Park, Chan‐Gyung Park, Jai-chan Hwang +2 · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #astro-ph.CO #gr-qc #hep-ph #hep-th

paper · pdf · doi:10.1103/physrevlett.103.151303

published as Phys.Rev.Lett.103:151303,2009 · 5 pages, 4 figures

openalex publication_date 2009/10/09 · arxiv created 2009/10/22 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We show the importance of properly including the perturbations of the dark energy component in the dynamical dark energy models based on a scalar field and modified gravity theories in order to meet with present and future observational precisions. Based on a simple scaling scalar field dark energy model, we show that observationally distinguishable substantial differences appear by ignoring the dark energy perturbation. By ignoring it the perturbed system of equations becomes inconsistent and deviations in (gauge-invariant) power spectra depend on the gauge choice.

Citations

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant

Cited by

• Baryonic matter perturbations in decaying vacuum cosmology
• Dark energy homogeneity in general relativity: Are we applying it correctly?

Related

• Dark Energy Phenomenology
• Dark energy constraints in light of theoretical priors
• Distinguishing modified gravity from dark energy
• Perturbations In Some Dark Energy Models
• Effective field theory for perturbations in dark energy and modified gravity