论文标题
高分辨率光谱线指数有助于分析恒星种群
High Resolution Spectral Line Indices Useful for the Analysis of Stellar Populations
论文作者
论文摘要
众所周知的年龄金属衰老变性不允许对恒星和恒星种群的基本参数进行唯一且良好的估计。可以使用光谱线指数避免尘埃的影响，但是当前方法无法打破年龄金属性堕落。在这里，我们表明，使用信噪比（S/N）> 10的高分辨率（r = 6000）光谱（r = 6000）光谱（r = 6000）> 10使用两个新的光谱线指数（r = 6000）> 10，一个人对中间人的年龄和金属性的明确估计值估计到旧恒星群体的年龄和金属性。可以使用新天文学设施（例如X射击器，Megara和Mosaic）检索的光谱数据，可通过光谱线索引索引索引和索引图分析来推断发射源的物理参数。
The well-known age-metallicity-attenuation degeneracy does not permit unique and good estimates of basic parameters of stars and stellar populations. The effects of dust can be avoided using spectral line indices, but current methods have not been able to break the age-metallicity degeneracy. Here we show that using at least two new spectral line indices defined and measured on high-resolution (R= 6000) spectra of a signal-to-noise ratio (S/N) > 10 one gets unambiguous estimates of the age and metallicity of intermediate to old stellar populations. Spectroscopic data retrieved with new astronomical facilities, e.g., X-shooter, MEGARA, and MOSAIC, can be employed to infer the physical parameters of the emitting source by means of spectral line index and index--index diagram analysis.
