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arXiv 1208.0334astro-ph.CO
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暗物质晕中的非束缚粒子

Unbound Particles in Dark Matter Halos

Peter S. Behroozi, Abraham Loeb, Risa H. Wechsler

摘要:

我们调查未绑定的暗物质粒子晕跟踪粒子轨迹模拟运行到遥远的未来(a = 100)。我们发现,传统的动能和势能的总和是一个非常差的预测暗物质粒子最终将成为从晕中解脱出来。我们还研究了未结合粒子的质量分数,这增加了强烈的边缘晕,并在较高的红移显着降低。我们讨论了暗物质探测实验的影响,晕质量函数的精确校准,使用重子分数来约束暗能量,并寻找星系际超新星。

英文摘要:

We investigate unbound dark matter particles in halos by tracing particle trajectories in a simulation run to the far future (a = 100). We find that the traditional sum of kinetic and potential energies is a very poor predictor of which dark matter particles will eventually become unbound from halos. We also study the mass fraction of unbound particles, which increases strongly towards the edges of halos, and decreases significantly at higher redshifts. We discuss implications for dark matter detection experiments, precision calibrations of the halo mass function, the use of baryon fractions to constrain dark energy, and searches for intergalactic supernovae.

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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