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Interacting quintessence and growth of structure
Journal of Astrophysics and Astronomy ( IF 1.1 ) Pub Date : 2019-10-01 , DOI: 10.1007/s12036-019-9607-0
Azam Hussain

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.

中文翻译:

交互精华与结构成长

在标准宇宙学中,暗能量仅与暗物质在引力上相互作用。此图的扩展是交互精髓 (IQ) 模型,其中标量场直接耦合到冷暗物质。在 IQ 模型 wrt $\Lambda$CDM 中研究了相互作用参数 W 的不同值的百分比偏差。我们研究了相互作用对物质、凯撒和星系功率谱的影响。功率谱的偏差随着大尺度和小尺度的相互作用而增加。在小尺度上,变化比在大尺度上小。大尺度上是暗能量扰动,小尺度上是背景演化造成差异。这些变化随着红移的增加而减少。本文研究了具有线性势的模型的解冻类。
更新日期:2019-10-01
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