Problems in Stellar Abundances and Chemical Evolution: Solutions from Infrared Spectroscopy

“恒星丰度和化学演化中的问题：来自红外光谱的解决方案”AST-0098619我们银河系的中心区域被严重遮挡，直到红外仪器的发展，才能进行光谱观测。但正是在这里，我们预计会看到活跃的恒星形成对我们星系化学丰度的长期影响。因此，红外光谱仪的出现为观测恒星打开了一扇新的机会之窗，以调查它们可能最明显的丰度趋势。在这两年的奖项中，这项工作将针对光晕和银河系中心区域中冷恒星大气中氧和碳的丰度变化。在红外线下工作的另一个优势来自于光谱的相对清洁和更好地理解的大气不透明度。该项目将在Cerro Tololo美洲天文台和夏威夷的红外望远镜设施使用高分辨率梯形光谱仪。用两个双子座望远镜进行观测的计划也在制定中。

" Problems in Stellar Abundances and Chemical Evolution: Solutions from Infrared Spectroscopy "AST- 0098619The central region of our galaxy is heavily obscured and, until the development of infrared instrumentation, was inaccessible to spectroscopic observation. But it is here that we expect to see the long-term effects of vigorous star formation on the chemical abundances of our galaxy. Thus the availability of infrared spectrographs has opened a new window of opportunity for observing stars to investigate abundance trends where they are likely to be the most conspicuous. The work during this two year award will be directed towards the changing abundances of oxygen and carbon in the atmospheres of cool stars in the halo and in the galactic center region. A further advantage of working in the infrared comes from the relative cleanness of the spectrum and an atmospheric opacity which is better understood. The project will use high resolution echelle spectrographs at Cerro Tololo Inter-American Observatory and at the Infrared Telescope Facility in Hawaii. Plans are also being made to observe with the two Gemini telescopes.