High Signal-to-Noise CCD Spectroscopy of Interstellar Absorption Lines

CCD探测器技术的最新进展使其成为可能 获得高信噪比、高分辨率的恒星光谱 在波长和恒星亮度方面， 探讨了 迈耶博士将使用最新一代的CCD， 国家光学天文学的高分辨率光谱仪 天文台推动星际吸收的灵敏度 线研究。 这些研究对各种问题产生了影响 宇宙微波背景辐射大爆炸 核合成，银河系化学演化，以及结构， 星际介质的组成和化学性质。 迈耶医生 主要目标是详细了解 扩散介质中CN分子的宇宙和局域激发 星际云和研究小尺度结构 通过对星际物质的观测， 吸收线朝向可分辨的双星星星系统。

Recent advances in CCD detector technology have made it possible to obtain high signal-to-noise, high resolution spectra of stars in wavelength and stellar brightness regimes that have seldom been explored. Dr. Meyer will use the latest generation of CCDs and high resolution spectrographs at the National Optical Astronomy Observatories to push the sensitivity of interstellar absorption line studies. Such studies impact on a variety of issues concerning the cosmic microwave background radiation, Big Bang nucleosynthesis, Galactic chemical evolution, and the structure, composition, and chemistry of the interstellar medium. Dr. Meyer's principal goals are to obtain a detailed understanding of the cosmic and local excitation of the CN molecule in diffuse interstellar clouds and to investigate the small-scale structure in the interstellar medium through observations of the interstellar absorption lines toward resolvable binary star systems.