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arXiv 1404.7744astro-ph.COastro-ph.GAgr-qc
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存在暗能量的星系团:动力学方法

Galaxy clusters in presence of dark energy: a kinetic approach

Marco Merafina, Gennady S. Bisnovatyi-Kogan, Martina Donnari

摘要:

上下文星系团的外部区域可能受到暗能量的强烈影响,这是在红移z < 1的Ia超新星观测中发现的。目标。引力平衡方程中的暗能量与爱因斯坦$Λ$项的存在,与引力形成对比,使得平衡位形的半径更大。方法.在本文中,我们推导和解决的动力学方程的平衡位形存在的暗能量,通过考虑牛顿制度,是观察到的星系团内的速度大大小于光速。结果引力平衡方程中暗能量的存在导致$W_0-ρ_Λ$图中不允许平衡解的宽区域,这是由于暗能量对引力的影响的普遍性。

英文摘要:

Context. The external regions of galaxy clusters may be under strong influence of the dark energy, discovered by observations of the SN Ia at redshift z < 1. Aims. The presence of the dark energy in the gravitational equilibrium equation, with the Einstein $Λ$ term, contrasts the gravity, making the equilibrium configuration more extended in radius. Methods. In this paper we derive and solve the kinetic equation for an equilibrium configuration in presence of the dark energy, by considering the Newtonian regime, being the observed velocities of the galaxies inside a cluster largely smaller than the light velocity. Results. The presence of the dark energy in the gravitational equilibrium equation leads to wide regions in the $W_0-ρ_Λ$ diagram where the equilibrium solutions are not permitted, due to the prevalence of the effects of the dark energy on the gravity.

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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