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arXiv 1108.4173astro-ph.CO
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矢量暗能量和高Z质量星系团

Vector dark energy and high-z massive clusters

Edoardo Carlesi, Alexander Knebe, Gustavo Yepes, Stefan Gottloeber, Jose Beltran Jimenez, Antonio L. Maroto

摘要:

在$z>1$(如SPT-CL J0546 - 5345、SPT-CL J2106 - 5844和XMMU J2235.3 - 2557)上发现超大质量星系团被一些作者认为是对标准\LCDM $\;$宇宙学的挑战。事实上,假设高斯初始条件,检测这样的对象的理论期望值低至$\leq 1%$。在这个\textit{Letter}中,我们讨论了矢量暗能量(VDE)范式的光中存在这样的对象的概率,显示通过一系列的$N$体模拟,检测的机会大大提高在这个非标准的框架。

英文摘要:

The detection of extremely massive clusters at $z>1$ such as SPT-CL J0546-5345, SPT-CL J2106-5844, and XMMU J2235.3-2557 has been considered by some authors as a challenge to the standard \LCDM$\;$cosmology. In fact,assuming Gaussian initial conditions, the theoretical expectation of detecting such objects is as low as $\leq 1%$. In this \textit{Letter} we discuss the probability of the existence of such objects in the light of the Vector Dark Energy (VDE) paradigm, showing by means of a series of $N$-body simulations that chances of detection are substantially enhanced in this non-standard framework.

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