AI 中文总结
本研究分析233颗邻近FGK型恒星的磷丰度，发现磷与多种元素共富集，可作为太阳邻域化学丰度的示踪剂，支持其主要起源于核心坍缩超新星。
AI 中文摘要
生物必需元素的分布是评估星系环境化学丰度的关键。我们从Hypatia星表中分析了233颗邻近FGK型恒星的磷丰度，区分薄盘与厚盘恒星族群。我们采用非参数检验和自助重抽样方法，研究[P/Fe]随[Fe/H]及其他元素丰度的变化规律，同时分析固定[Fe/H]下的残余相关性及与磷相关的摩尔比。我们发现[P/Fe]-[Fe/H]趋势与α元素大致相似，支持其主要起源于核心坍缩超新星，而偏离趋势则指向额外的核合成通道。磷与多种CHNOPS元素、α元素及铁峰元素存在强正相关，尤其在薄盘中表现显著。这些共富集模式在固定[Fe/H]时仍具统计学意义，表明其并非整体金属丰度的平凡结果。薄盘恒星在多种元素上的富集程度也高于厚盘恒星。太阳的P/Mg和P/Si比率代表了本地恒星族群的特征，而太阳的P/O比率相对偏高。总体而言，磷可作为真实多元素共富集及太阳邻域化学丰度的示踪剂。
英文摘要
The distribution of bio-essential elements is key to assessing the chemical fertility of galactic environments. We analyse phosphorus abundances for 233 nearby FGK stars from the Hypatia Catalog, separating thin- and thick-disk populations. We study [P/Fe] as a function of [Fe/H] and other elemental abundances using non-parametric tests and bootstrap resampling, and we examine residual correlations at fixed [Fe/H] together with molar ratios involving P. We find a [P/Fe]-[Fe/H] trend broadly similar to that of alpha elements, supporting a dominant origin in core-collapse supernovae, while deviations point to additional nucleosynthetic channels. Phosphorus shows strong positive correlations with several CHNOPS, alpha, and Fe-peak elements, especially in the thin disk. These co-enrichment patterns remain significant at fixed [Fe/H], indicating that they are not a trivial consequence of global metallicity. Thin-disk stars are also more enriched than thick-disk stars in many elements. The solar P/Mg and P/Si ratios are representative of the local stellar population, whereas solar P/O is relatively elevated. Overall, phosphorus emerges as a tracer of genuine multi-element co-enrichment and of the chemical fertility of the solar neighbourhood.
CommentsAccepted for publication in Astronomy & Astrophysics
