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 with respect to \(\Lambda \)CDM for varied values of the interacting parameter W. We investigated the effect of interaction on matter, kaiser and galaxy power spectrums. The deviation in power spectrum increases with interaction on both large and small scales. On small scales, variation is comparatively smaller than on large scale. On large scales, it is due to dark energy perturbation, while it is background evolution that causes a difference on small scale. These variations decreases with increase in redshift. Herein the thawing class of model with linear potential is studied.
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Hussain, A. Interacting quintessence and growth of structure. J Astrophys Astron 40, 43 (2019). https://doi.org/10.1007/s12036-019-9607-0
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DOI: https://doi.org/10.1007/s12036-019-9607-0