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arXiv 1407.7544astro-ph.COastro-ph.GA
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对暗物质模型的天体物理学约束的再检验

Re-Examining Astrophysical Constraints on the Dark Matter Model

Alyson Brooks

摘要:

最近包括冷暗物质(CDM)和重子在内的高分辨率模拟表明,重子物理学可以极大地改变星系的暗物质结构。这些结果修改了我们对观测到的星系演化和结构的预测。考虑到这些更新的期望,现在是时候重新审视暗物质模型的观测约束了。一些观察评论,可能间接跟踪暗物质,并可能有助于确认或否认可能的暗物质模型。暖暗物质(WDM)和自相互作用暗物质(SIDM)是目前最受欢迎的CDM替代模型。对WDM粒子质量的限制要求它非常重,以至于WDM几乎无法与CDM区分。SIDM的最佳观测测试可能是在昏暗矮星系的暗物质分布中,但SIDM中缺乏解释重子作用的星系结构的理论预测。

英文摘要:

Recent high-resolution simulations that include Cold Dark Matter (CDM) and baryons have shown that baryonic physics can dramatically alter the dark matter structure of galaxies. These results modify our predictions for observed galaxy evolution and structure. Given these updated expectations, it is timely to re-examine observational constraints on the dark matter model. A few observations are reviewed that may indirectly trace dark matter, and may help confirm or deny possible dark matter models. Warm Dark Matter (WDM) and Self-Interacting Dark Matter (SIDM) are currently the favorite alternative models to CDM. Constraints on the WDM particle mass require it to be so heavy that WDM is nearly indistinguishable from CDM. The best observational test of SIDM is likely to be in the dark matter distribution of faint dwarf galaxies, but there is a lack of theoretical predictions for galaxy structure in SIDM that account for the role of baryons.

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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