Interacting Quintessence and Growth of Structure

Abstract

In standard cosmologies, dark energy interacts only gravitationally with dark matter. An extension to this picture is interacting quintessence (IQ) model, where scalar field coupled directly to cold dark matter. The percentage deviation is studied in IQ model wrt $\Lambda$CDM for varied values of interacting parameter W. We investigated the effect of interaction on matter, Kaiser and galaxy power spectrums. Deviation in power spectrum increases with interaction on both large and small scales. On small scale, variation is comparatively smaller than on large scale. On large scale, it is due to dark energy perturbation while it is background evolution that causes a difference on small scale. These variations decrease with increase in redshift. Herein thawing class of model with linear potential is studied.

19 pages, 8 figures

References in corpus (13)

• Dynamics of dark energy
• A 2.4% Determination of the Local Value of the Hubble Constant
• Reconstructing Dark Energy
• Large-scale instability in interacting dark energy and dark matter fluids
• Dynamics of interacting dark energy
• Growing Matter
• Tidal Tails Test the Equivalence Principle in the Dark Sector
• The Growth of Structure in Interacting Dark Energy Models
• Axions as Quintessence in String Theory
• Interacting quintessence from a variational approach Part I: algebraic couplings
• Imprint of thawing scalar fields on large scale galaxy overdensity
• Probing the Spacetime Around Supermassive Black Holes with Ejected Plasma Blobs
• Dark Energy from Casimir Energy on Noncommutative Extra Dimensions