论文标题

早期黑暗能源宇宙学模型中的聚类和光晕丰度

Clustering and Halo Abundances in Early Dark Energy Cosmological Models

论文作者

Klypin, Anatoly, Poulin, Vivian, Prada, Francisco, Primack, Joel, Kamionkowski, Marc, Avila-Reese, Vladimir, Rodriguez-Puebla, Aldo, Behroozi, Peter, Hellinger, Doug, Smith, Tristan L.

论文摘要

已经提出了具有早期暗能量(EDE)的LCDM宇宙学模型,以解决本地测量的哈勃常数H0 = 100h km/s/mpc之间的张力,从而提供了H〜0.73和H0,从Planck宇宙微波背景(CMB)和其他早期的环球测量值和其他早期的环球测量以及LCDM,可提供H0。 EDE模型通过添加一个标量字段来实现这一目标,该标量暂时添加了在红移Z〜3500处辐射主​​导的ERA结束时的宇宙能量密度的约10%。在这里,我们比较了planck klostk-sarmoratizatization LCDM模型的线性和非线性预测,包括EDE,包括h = 0.728的EDE与标准palland palland palland lcd lcd h = 0.728。我们发现,非线性进化减少了低红移波动的功率光谱之间的差异。结果,在z = 0时,银河尺度上的光环质量功能几乎相同,差异仅为1-2%。但是,在高红移时差异大大增加。 EDE模型预测,在Z = 1处的大规模簇增加了50%,在Z = 4处的Galaxy-Mas Halos增加了两倍。在较高的红移处,Galaxy-Mass Halos的丰度增加可能会使使用EDE更容易地将Univers恢复到宇宙。预测的星系丰度和聚类将很快通过JWST观测来测试。在模型之间,男性声音振荡(BAO)和相关函数的位置差异约为2% - 这种效应并未被非线性冲洗掉。在此研究的标准LCDM和EDE模型都与目前可用的声学观测值一致,但是DESI和Euclid测量结果将提供严格的新测试。

LCDM cosmological models with Early Dark Energy (EDE) have been proposed to resolve tensions between the Hubble constant H0 = 100h km/s/Mpc measured locally, giving h ~ 0.73, and H0 deduced from Planck cosmic microwave background (CMB) and other early universe measurements plus LCDM, giving h ~ 0.67. EDE models do this by adding a scalar field that temporarily adds dark energy equal to about 10% of the cosmological energy density at the end of the radiation-dominated era at redshift z ~ 3500. Here we compare linear and nonlinear predictions of a Planck-normalized LCDM model including EDE giving h = 0.728 with those of standard Planck-normalized LCDM with h = 0.678. We find that nonlinear evolution reduces the differences between power spectra of fluctuations at low redshifts. As a result, at z = 0 the halo mass functions on galactic scales are nearly the same, with differences only 1-2%. However, the differences dramatically increase at high redshifts. The EDE model predicts 50% more massive clusters at z = 1 and twice more galaxy-mass halos at z = 4. Even greater increases in abundances of galaxy-mass halos at higher redshifts may make it easier to reionize the universe with EDE. Predicted galaxy abundances and clustering will soon be tested by JWST observations. Positions of baryonic acoustic oscillations (BAOs) and correlation functions differ by about 2% between the models -- an effect that is not washed out by nonlinearities. Both standard LCDM and the EDE model studied here agree well with presently available acoustic-scale observations, but DESI and Euclid measurements will provide stringent new tests.

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