标题： 58个银晕球状星团中P、S和K的丰度来自APOGEE 显示英文标题

标题： Abundances of P, S, and K in 58 bulge spheroid stars from APOGEE

摘要： 我们之前基于H波段的光谱线研究了58颗银晕球状星中的几个元素。我们现在推导了较少研究的元素磷（P；Z=15）、硫（S；Z=16）和钾（K；Z=19）的丰度。将58颗银晕球状星中P、S和K的丰度与之前对阿帕奇点天文台银河系演化实验（APOGEE）数据的分析结果以及这些元素的一些可用研究进行了比较。我们通过光谱合成推导出个体丰度，使用来自APOGEE项目DR17发布中为我们样本提供的恒星物理参数。我们提供了在H波段中用于研究元素的最佳谱线的建议。我们还将目前的结果与文献数据一起与化学演化模型进行了比较。最后，考虑了中微子过程以适合地拟合奇-Z元素P和K。我们确认H波段对于推导中等金属贫乏恒星中的元素P、S和K具有有用的谱线。与高分辨率光谱学的文献结果一起绘制的丰度表明：发现了中等增强的磷星，类似于对金属丰度[Fe/H]~-1.0的厚盘和晕星获得的结果。因此，这是我们首次在银晕球状星的老恒星中识别出这种现象。硫是一种α元素，行为也如此。钾和硫都表现出一些恒星间的散射，但符合化学演化模型的预期。 显示英文摘要

摘要： We have previously studied several elements in 58 selected bulge spheroid stars, based on spectral lines in the H-band. We now derive the abundances of the less-studied elements phosphorus (P; Z=15), sulphur (S; Z=16), and potassium (K; Z=19). The abundances of P, S, and K in 58 bulge spheroid stars are compared both with the results of a previous analysis of the data from the Apache Point Observatory Galactic Evolution Experiment (APOGEE), and with a few available studies of these elements. We derive the individual abundances through spectral synthesis, using the stellar physical parameters available for our sample from the DR17 release of the APOGEE project. We provide recommendations for the best lines to be used for the studied elements among those in the H-band. We also compare the present results, together with literature data, with chemical-evolution models. Finally, the neutrino-process was taken into account for the suitable fit to the odd-Z elements P and K. We confirm that the H-band has useful lines for the derivation of the elements P, S, and K in moderately metal-poor stars. The abundances, plotted together with literature results from high-resolution spectroscopy, indicate that: moderately enhanced phosphorus stars are found, reminiscent results obtained for thick disk and halo stars of metallicity [Fe/H]~-1.0. Therefore, for the first time, we identify this effect to occur in the old stars from the bulge spheroid. Sulphur is an alpha-element and behaves as such. Potassium and sulphur both exhibit some star-to-star scatter, but fit within the expectations from chemical evolution models.