暗晕次结构的演化

发布时间：2018-01-02 17:38

本文关键词：暗晕次结构的演化　出处：《天文学报》2012年01期 　论文类型：期刊论文

【摘要】：正在主流的冷暗物质(cold dark matter,CDM)模型中,暗物质由于引力不稳定性塌缩成位力化的结构,形成所谓的暗物质晕(dark matter halo),然后重子气体由于辐射消耗能量而落入这些暗晕的中心,最终形成星系.暗晕一般是通过等级成团的方式形成,即小质量暗晕先塌缩形成,进而通过并合形成更大尺度的暗晕.并合后的小质量暗晕不会立即消失,而形成暗晕(主暗晕,host halo)的次结构(dark matter halo substructure或subhalo).在次结构中形成的星系是在主暗晕中形成的中心星系的伴星系(satellite galaxy,亦称卫星星系).伴星系因为质量小、光度低而成为观测中的矮星系.
[Abstract]:Is the mainstream of the cold dark matter (cold dark, matter, CDM) model, dark matter gravitational instability due to structural collapse to force the formation of the so-called dark matter halo (dark matter halo), then the baryonic gas due to the radiation energy consumption and fall into the dark halo center, and ultimately the formation of dark halo galaxies. Is generally formed by hierarchical clustering methods, namely small halos to collapse to form, and the formation of a larger scale by combination of the dark halo. And after the small mass of the dark halo will not disappear immediately, and the formation of dark halo (halo master, host halo (dark) of the secondary structure of matter halo substructure or subhalo). Formed in the secondary structure of the galaxies in the center of the galaxy is formed in the main halo of the galaxy (satellite galaxy, also known as the satellite Galaxy Galaxy). Because the quality of small, low luminosity and become dwarf galaxies in the observation.

【作者单位】：中国科学院上海天文台;
【分类号】：P145.9
【正文快照】： 在主流的冷暗物质(cokl dark mat七er，CDM)模型中，，暗物质由于引力不稳定性塌缩成位力化的结构，形成所谓的暗物质晕(dark matter halo)，然后重子气体由于辐射消耗能量而落入这些暗晕的中心，最终形成星系.暗晕一般是通过等级成团的方式形成，即小质量暗晕先塌缩形成，进而

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