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arXiv 1303.7166astro-ph.CO
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存在暗能量的星系团风

Galactic cluster winds in presence of a dark energy

G. S. Bisnovatyi-Kogan, M. Merafina

摘要:

在均匀暗能量(DE)存在的情况下,我们得到了多方气体从引力中心流出的流体动力学解。DE的反重力作用对外流起着启发作用,使外流在相同密度下,在较小的初始温度下发生成为可能。存在DE时,风的主要特性是其在通过临界点后的无限加速度。将这个解应用于来自星系团的风,我们认为,强烈加速的风与另一个星系团的碰撞,或与另一个星系团风的碰撞,可能导致最高能量宇宙射线的形成。

英文摘要:

We obtain a solution for the hydrodynamic outflow of the polytropic gas from the gravitating center, in presence of the uniform Dark Energy (DE). The antigravity of DE is enlightening the outflow and make the outflow possible at smaller initial temperature, at the same density. The main property of the wind in presence of DE is its unlimited acceleration after passing the critical point. In application of this solution to the winds from galaxy clusters we suggest that collision of the strongly accelerated wind with another galaxy cluster, or with another galactic cluster wind could lead to the formation of a highest energy cosmic rays.

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