标题： 银河宇宙射线核合成的复兴？ 显示英文标题

标题： The Revival of Galactic Cosmic Ray Nucleosynthesis?

摘要： 由于低金属量晕星中Be/H与Fe/H之间存在近似线性相关性，有人认为在标准银河宇宙射线核合成的“次级”成分之外，必须存在一个“初级”成分来解释Be的核合成。 在本文中，我们对Li、Be和B演化的初级与次级特征的证据进行了批判性的重新评估，分析了观测数据和银河化学演化模型。 虽然[Be/H]与[Fe/H]之间的对数斜率接近1，但直接源于碎裂产物理论的是Be-O趋势。 利用基于紫外OH线的新晕星氧丰度，我们发现Be-O斜率由于系统效应存在较大不确定性，使得难以区分次级斜率2和初级斜率1。 Be-Fe和Be-O斜率之间的可能差异是由于O/Fe与Fe的变化引起的：最近的数据表明其斜率为负，而不是通常假设的零（即Fe$\propto$O）。 除了对Be和B演化的现象学分析外，我们还研究了包含流出的银河化学演化模型中预测的LiBeB、O和Fe趋势。 根据我们的结果，拟合LiBeB演化可能只需要传统的银河宇宙射线碎裂作用和（初级）中微子过程对B11的贡献。 因此，我们认为这两种过程可能足以解释银河系中Li6、Be和B的演化，而无需额外的Be和B初级来源。 显示英文摘要

摘要： Because of the roughly linear correlation between Be/H and Fe/H in low metallicity halo stars, it has been argued that a ``primary'' component in the nucleosynthesis of Be must be present in addition to the ``secondary'' component from standard Galactic cosmic ray nucleosynthesis. In this paper we critically re-evaluate the evidence for the primary versus secondary character of Li, Be, and B evolution, analyzing both in the observations and in Galactic chemical evolution models. While it appears that [Be/H] versus [Fe/H] has a logarithmic slope near 1, it is rather the Be-O trend that directly arises from the physics of spallation production. Using new abundances for oxygen in halo stars based on UV OH lines, we find that the Be-O slope has a large uncertainty due to systematic effects, rendering it difficult to distinguish from the data between the secondary slope of 2 and the primary slope of 1. The possible difference between the Be-Fe and Be-O slopes is a consequence of the variation in O/Fe versus Fe: recent data suggests a negative slope rather than zero (i.e., Fe $\propto$ O) as is often assumed. In addition to a phenomenological analysis of Be and B evolution, we have also examined the predicted LiBeB, O, and Fe trends in Galactic chemical evolution models which include outflow. Based on our results, it is possible that a good fit to the LiBeB evolution requires only traditional the Galactic cosmic ray spallation, and the (primary) neutrino-process contribution to B11. We thus suggest that these two processes might be sufficient to explain Li6, Be, and B evolution in the Galaxy, without the need for an additional primary source of Be and B.