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Baryons as a unified solution to small scale structures issues of the #3;CDM model

Baryons as a unified solution to small scale structures issues of the ΛCDM model

摘要:在本文中,借助半解析代码,我们展示了在CDM模型中考虑重子物理学如何解决CDM框架中暗物质晕的数值预测与从矮小星系尺度到星系团观测结果之间的差异,而不需要像[1]最近提出的不同形式的暗物质。结合已有的结果,本文首次说明了在正确考虑重子物理的情况下,如何自然地得到星系团的平坦分布及其几个主要性质之间的关联,如何解决所谓的“多样性问题”,以及如何在考虑重子物理时很好地再现IC 2574极具挑战性的极低上升旋转曲线。因此,我们建议在标准宇宙学模型中引入新的奇异特征之前,尽管是合法的,重子模型。 物理学应该得到适当的处理,以便与观测达成一致。

英文摘要:In the present letter, with the help of a semi-analytical code we show how taking into account baryonic physics in the #3;CDM model can solve the discrepancy between the numerical predictions of dark matter haloes in the #3;CDM framework and observations from dwarf galaxy scale to clusters of galaxies without the need of different forms of dark matter as recently advocated by [1]. Combining well established results, the paper shows, for the first time, how the flat profiles of galaxy clusters and correlations between several of their main properties, are naturally obtained when baryon physics is correctly taken into account; how the so called ”diversity problem” can be solved and how the challenging, extremely low rising rotation curve of IC2574 can very well be reproduced when baryon physics is taken into account. We therefore suggest that before introducing new exotic features in the standard cosmological model, albeit legitimate, baryonic physics should be treated properly to reach agreement with observations.

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[V1] 2018-02-07 16:42:24 chinaXiv:201802.00448V1 下载全文
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