论文标题
M矮人的问题：M矮星的体积有限样品中的Fe和Ti丰度
The M dwarf problem: Fe and Ti abundances in a volume-limited sample of M dwarf stars
论文作者
论文摘要
我们报告了高分辨率光谱中的铁和钛丰度测量值，在106 M0和M0.5矮星的体积限制样品中。该样品包括天体赤道以北的恒星，比29 parsec更近。结果表明，存在类似于先前已知的G矮人问题的M矮人问题，因为低金属性M矮人的比例不足以适合简单的银河化学化学演化的闭合盒模型。该体积有限的样本避免了先前研究中使用M矮星的亮度限制样品的许多统计不确定性
We report iron and titanium abundance measurements from high resolution spectra in a volume-limited sample of 106 M0 and M0.5 dwarf stars. The sample includes stars north of the celestial equator and closer than 29 parsecs. The results imply that there is an M dwarf problem similar to the previously known G dwarf problem, in that the fraction of low-metallicity M dwarfs is not large enough to fit simple closed-box models of Galactic chemical evolution. This volume-limited sample avoids many of the statistical uncertainties present in a previous study using a brightness-limited sample of M dwarf stars
