论文标题

Lamost中分辨率调查的黯然失色的二进制文件。高精度经验恒星群众图书馆

The Eclipsing Binaries from the LAMOST Medium-resolution Survey.III. A High-precision Empirical Stellar Mass Library

论文作者

Xiong, Jianping, Liu, Chao, Li, Jiao, Li, Jiadong, Zhang, Bo, Chen, Xiaodian, Luo, Changqing, Cao, Zihuang, Zhao, Yongheng

论文摘要

直接从二进制中测得的高精度恒星质量和半径可以有效地校准恒星模型。但是,这种包含全光谱类型和大量金属性的数据库仍未完全确定。请求持续的数据收集和分析来完成数据库。在这项工作中,我们提供了一个包含184个二进制文件的目录,具有独立的大气参数,准确的质量和半径作为恒星质量和半径的基准。该目录中包含56种来自中等分辨率光谱(MRS)调查的新脱离二进制文件,并从先前的研究中汇总了128个脱离的Eclips Eclips Eclips。我们获得了新的分离二进制组的轨道溶液,其质量不确定性和半径小于5%。这些新样品致密地致密,高精度恒星质量文库的金属性分布,并添加9个热星,Teff> 8000K。比较表明,这些样品与Teff-Logg-logg-mass-radius-luminitusion space中的Parsec等速线相一致。我们分别比较了从等异隆和SED拟合的质量和半径估计值与二元轨道溶液中的质量和半径。我们发现,恒星模型依赖性质量估计值> 10%,基于大气参数的半径估计的精度> 15%。这些一般看出了估计恒星质量和半径的常用方法的不确定性。

High-precision stellar mass and radius measured directly from binaries can effectively calibrate the stellar models. However, such a database containing full spectral types and large range of metallicity is still not fully established. A continuous effort of data collecting and analysis are requested to complete the database. In this work, we provide a catalog containing 184 binaries with independent atmospheric parameters and accurate masses and radii as the benchmark of stellar mass and radius. The catalog contains 56 new detached binaries from LAMOST Medium-resolution spectroscopic (MRS) survey and 128 detached eclipsing binaries compiled from previous studies. We obtain the orbital solutions of the new detached binaries with uncertainties of masses and radii smaller than 5%. These new samples densify the distribution of metallicity of the high-precision stellar mass library and add 9 hot stars with Teff>8000 K. Comparisons show that these samples well agree with the PARSEC isochrones in Teff-logg-mass-radius-luminosity space. We compare mass and radius estimates from isochrone and SED fitting, respectively, with those from the binary orbital solution. We find that the precision of the stellar-model dependent mass estimates is >10% and the precision of the radius estimates based on atmospheric parameters is >15%. These give a general view of the uncertainty of the usual approaches to estimate stellar mass and radius.

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