超音速项目：冷却或不冷却超音速诱导气体物体（SILESS）？
The Supersonic Project: To cool or not to cool Supersonically Induced Gas Objects (SIGOs)?
摘要：
超音波感生气体天体（英语：Supersonically Induced Gas Objects，缩写为SIRST）主要形成于早期宇宙中，由于重子与暗物质之间存在相对流速，因此在暗物质晕之外。这些结构可能是球状星团的前身。由于超导体是由原始气体制成的，我们研究了原子冷却对其性质的影响。我们运行了一套模拟使用移动网格代码{ \sc arepo}，有和没有重子-暗物质的相对速度和有和没有原子冷却的影响。我们表明，SIGO的密度，温度和prolateness是由引力相互作用，而不是冷却。暗物质晕中的冷气体比例远高于暗物质晕。具体来说，我们表明，SIGO的特征低温和极高的气体密度锻造最早的恒星形成地点的孕育地。
英文摘要：
Supersonically Induced Gas Objects (SIGOs) primarily form in the early Universe, outside of dark matter halos due to the presence of a relative stream velocity between baryons and dark matter. These structures may be the progenitors of globular clusters. Since SIGOs are made out of pristine gas, we investigate the effect of atomic cooling on their properties. We run a suite of simulations by using the moving-mesh code {\sc arepo}, with and without baryon-dark matter relative velocity and with and without the effects of atomic cooling. We show that SIGO's density, temperature, and prolateness are determined by gravitational interactions rather than cooling. The cold gas fraction in SIGOs is much higher than that of dark matter halos. Specifically, we show that the SIGO's characteristic low temperature and extreme high gas density forges a nurturing ground for the earliest star formation sites.
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