The abundance of light nuclei and hyperons, that are produced in stellar environments such as supernova or binary mergers, is calculated within a relativistic mean-field model with density-dependent couplings in low-density matter. Five light nuclei are considered, together with three light hypernuclei. We show that the presence of hyperons shifts the dissolution of clusters to larger densities, and increases the amount of clusters. This effect is larger the smaller the charge fraction, and the higher the temperature. The abundance of hyperons is also affected by the cluster formation: neutral and positively charged hyperons suffer a reduction, and the negatively charged ones an increase. We also observe that the dissolution of the less-abundant clusters occurs at larger densities due to smaller Pauli-blocking effects. Overall, hypernuclei set in at temperatures above 25 MeV, and, depending on the temperature and chemical composition, they may be more abundant than $\alpha$ particles, or even more abundant than other heavier clusters.

中文翻译：

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低密度热恒星物质中的轻超星团和超子

在超新星或双星合并等恒星环境中产生的光核和超子的丰度是在相对论平均场模型中计算的，该模型具有低密度物质中的密度相关耦合。考虑了五个轻核，以及三个轻超核。我们表明超子的存在将簇的溶解转移到更大的密度，并增加了簇的数量。这种影响越大，电荷分数越小，温度越高。超子的丰度也受簇形成的影响：中性和带正电的超子减少，带负电的超子增加。我们还观察到，由于较小的泡利阻塞效应，较少量的簇的溶解发生在较大的密度下。总体，$\alpha$ 粒子，甚至比其他更重的星团更丰富。