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arXiv 1012.3203astro-ph.COgr-qc
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从暗能量-重子物质耦合看暗物质

Dark matter from dark energy-baryonic matter couplings

Alejandro Aviles, Jorge L. Cervantes-Cota

摘要:

我们提出了一个方案,其中标量场暗能量耦合到重子物质场的能量动量张量的轨迹。在慢卷状态下,这种相互作用可以产生暗物质的宇宙学特征。我们利用Union 2超新星数据集计算了宇宙学背景解,并拟合了模型的参数。然后,我们将宇宙学扰动发展到线性阶,发现微扰变量具有可接受的行为,特别是在适当选择耦合强度参数的情况下,重子物质的密度衬度与$Λ$ CDM模型中的密度衬度相似.

英文摘要:

We present a scenario in which a scalar field dark energy is coupled to the trace of the energy momentum tensor of the baryonic matter fields. In the slow-roll regime, this interaction could give rise to the cosmological features of dark matter. We work out the cosmological background solutions and fit the parameters of the model using the Union 2 supernovae data set. Then, we develop the cosmological perturbations up to linear order, and we find that the perturbed variables have an acceptable behavior, in particular the density contrast of baryonic matter grows similar to that in the $Λ$CDM model for a suitable choice of the strength parameter of the coupling.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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