论文标题
从Apogee调查中的M矮人基准样本的详细化学丰度
Detailed Chemical Abundances for a Benchmark Sample of M Dwarfs from the APOGEE Survey
论文作者
论文摘要
单个化学丰度的14个元素(C,O,Na,Mg,Al,Si,K,Ca,Ca,Ti,V,Cr,Mn,Fe和Ni)用于使用SDSSSS-IV/Apogee调查的高分辨率近交易所$ H $ band Spectra,用于M-DWARFS样品。定量分析包括使用Apogee DR17线列表使用1-D LTE平面MARCS模型计算的合成光谱,以确定化学丰度。该样品由二元系统中的11个M少量组成,该系统具有温暖的FGK-DWARF初选和十个测得的干涉角直径。为了最大程度地减少原子扩散效应,使用[X/Fe]比进行比较二进制系统中的M型和文献结果的M型,并为其温暖的原主恒星比较,这表明所有研究元素的良好一致性($ <$ <$ <$ 0.08 dex)。初选的平均丰度差异 - 这项工作的M-warfs为-0.05 $ \ pm $ 0.03 dex。它表明二进制系统中的M型是校准经验关系的可靠方法。与丰度,有效温度和表面重力的比较是由ASPCAP管道(DR16)引起的,发现[m/h],$ t _ {\ rm eff} $,log $ g $ g $ = +0.21 dex,-50 k和0.30 dex的系统偏移,尽管aspcap [x/fe]比率分别是一致的。 M矮人的金属度涵盖了[Fe/H] = -0.9至+0.4的范围,并用于通过[X/Fe]的趋势来研究银河化学演化,这是[Fe/H]的函数。各种元素丰度[X/Fe]与[Fe/H]的行为与较温暖的FGK-DWARFS得出的相应趋势非常吻合,这表明Apogee光谱可用于使用选定的M-dwarfs的大型样品用于银河化学演化。
Individual chemical abundances for fourteen elements (C, O, Na, Mg, Al, Si, K, Ca, Ti, V, Cr, Mn, Fe, and Ni) are derived for a sample of M-dwarfs using high-resolution near-infrared $H$-band spectra from the SDSS-IV/APOGEE survey. The quantitative analysis included synthetic spectra computed with 1-D LTE plane-parallel MARCS models using the APOGEE DR17 line list to determine chemical abundances. The sample consists of eleven M-dwarfs in binary systems with warmer FGK-dwarf primaries and ten measured interferometric angular diameters. To minimize atomic diffusion effects, [X/Fe] ratios are used to compare M-dwarfs in binary systems and literature results for their warmer primary stars, indicating good agreement ($<$0.08 dex) for all studied elements. The mean abundance differences in Primaries-this work M-dwarfs is -0.05$\pm$0.03 dex. It indicates that M-dwarfs in binary systems are a reliable way to calibrate empirical relationships. A comparison with abundance, effective temperature, and surface gravity results from the ASPCAP pipeline (DR16) finds a systematic offset of [M/H], $T_{\rm eff}$, log$g$ = +0.21 dex, -50 K, and 0.30 dex, respectively, although ASPCAP [X/Fe] ratios are generally consistent with this study. The metallicities of the M dwarfs cover the range of [Fe/H] = -0.9 to +0.4 and are used to investigate Galactic chemical evolution via trends of [X/Fe] as a function of [Fe/H]. The behavior of the various elemental abundances [X/Fe] versus [Fe/H] agrees well with the corresponding trends derived from warmer FGK-dwarfs, demonstrating that the APOGEE spectra can be used to Galactic chemical evolution using large samples of selected M-dwarfs.