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

Souto, Diogo, Cunha, Katia, Smith, Verne V., García-Hernández, D. A., Holtzman, Jon A., Jönsson, Henrik, Mahadevan, Suvrath, Majewski, Steven R., Masseron, Thomas, Pinsonneault, Marc, Schneider, Donald P., Shetrone, Matthew, Stassun, Keivan G., Terrien, Ryan, Zamora, Olga, Stringfellow, Guy S., Lane, Richard R., Nitschelm, Christian, Rojas-Ayala, Bárbara

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.

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