论文标题
充气后充气晕的形成
Formation of inflaton halos after inflation
论文作者
论文摘要
早期的宇宙可能已经经历了通货膨胀后和辐射统治开始之前的延长物质主导的扩张。在这样的时期，亚匹配密度的扰动在重力上生长，如果持续足够长的时间，则将其塌陷成结合结构。在当今宇宙中，这种阶段和结构形成之间的强类比允许使用N体模拟和光环形成的近似方法，以建模充气量冷凝物的片段化为Eftraton Halos。对于一个简单的模型，我们发现这些光环的质量最高为$ 20 \，\ mathrm {kg} $和RADII，$ 10^{ - 20} \，\ Mathrm {M Mathrm {M Mathrm {M Mathrm {m} $，大约$ 10^{ - 24} $ seconds。我们发现，N体元素质量函数与预期尺度范围内的质量峰斑块方法和新闻技术形式主义的预测相匹配。一个长的物质主导的阶段意味着重新加热和热化发生在密度较大的宇宙中，可能会改变该过程的动力学。另外，大量过度可以产生重力波，并可能导致原始黑洞的形成。
The early Universe may have passed through an extended period of matter-dominated expansion following inflation and prior to the onset of radiation domination. Sub-horizon density perturbations grow gravitationally during such an epoch, collapsing into bound structures if it lasts long enough. The strong analogy between this phase and structure formation in the present-day universe allows the use of N-body simulations and approximate methods for halo formation to model the fragmentation of the inflaton condensate into inflaton halos. For a simple model we find these halos have masses of up to $20\,\mathrm{kg}$ and radii of the order of $10^{-20}\,\mathrm{m}$, roughly $10^{-24}$ seconds after the Big Bang. We find that the N-body halo mass function matches predictions of the mass-Peak Patch method and the Press-Schechter formalism within the expected range of scales. A long matter-dominated phase would imply that reheating and thermalization occurs in a universe with large variations in density, potentially modifying the dynamics of this process. In addition, large overdensities can source gravitational waves and may lead to the formation of primordial black holes.
