• Interacting quintessence and growth of structure

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      https://www.ias.ac.in/article/fulltext/joaa/040/05/0043

    • Keywords

       

      Cosmology theory; large-scale structure of the Universe; dark energy.

    • 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 darkmatter. 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.

    • Author Affiliations

       

      AZAM HUSSAIN1

      1. Centre for Theoretical Physics, Jamia Millia Islamia, New Delhi 110 025, India.
    • Dates

       
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