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arXiv 0807.1973astro-ph
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盘星系中的暗物质密度

Dark Matter Density in Disk Galaxies

J. A. Sellwood

摘要:

我表明,预测密度的内部暗物质晕的LCDM模型的结构形成似乎高于估计从真正的星系和酒吧的动力学摩擦的限制。如果在无碰撞坍缩模拟中被忽略的物理过程能够减少内晕中的暗物质密度,那么这种不一致性对LCDM模型来说就不是问题。我审查提出的机制,以实现所需的密度降低。

英文摘要:

I show that the predicted densities of the inner dark matter halos in LCDM models of structure formation appear to be higher than estimates from real galaxies and constraints from dynamical friction on bars. This inconsistency would not be a problem for the LCDM model if physical processes that are omitted in the collisionless collapse simulations were able to reduce the dark matter density in the inner halos. I review the mechanisms proposed to achieve the needed density reduction.

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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