论文标题
行星星云中的中子捕获元素丰度
Neutron-Capture Element Abundances in Planetary Nebulae
论文作者
论文摘要
Nebular光谱法是通过缓慢中子（N）捕获核合成（S-Process）评估重元素产生的有价值的工具。在过去的几年中，在敏感的高分辨率近红外光谱仪的帮助下，在行星星云（PNE）中已经确定了N捕获元件的几种过渡。结合光谱法，新发现的近红外线可实现比以前可能更准确的丰度确定，并提供对以前在PNE或其祖细胞中未曾研究过的元素的访问。在射手座矮星系和麦哲伦云中，在pne中也发现了中子捕获元素。在这篇简短的综述中，我讨论了S-Process富集的观察性研究的发展，重点是过去五年，并注意到一些空旷的问题和初步趋势。
Nebular spectroscopy is a valuable tool for assessing the production of heavy elements by slow neutron(n)-capture nucleosynthesis (the s-process). Several transitions of n-capture elements have been identified in planetary nebulae (PNe) in the last few years, with the aid of sensitive high-resolution near-infrared spectrometers. Combined with optical spectroscopy, the newly discovered near-infrared lines enable more accurate abundance determinations than previously possible, and provide access to elements that had not previously been studied in PNe or their progenitors. Neutron-capture elements have also been detected in PNe in the Sagittarius Dwarf galaxy and in the Magellanic Clouds. In this brief review, I discuss developments in observational studies of s-process enrichments in PNe, with an emphasis on the last five years, and note some open questions and preliminary trends.
