2009

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

Park, Chan-Gyung, Hwang, Jai-chan, Lee, Jae-heon et al.

Understand

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.

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