论文标题
恒星光度的简单统一光谱指标：扩展的通量加权重力 - 轻度关系
A Simple Unified Spectroscopic Indicator of Stellar Luminosity: the Extended Flux Weighted Gravity-Luminosity Relationship
论文作者
论文摘要
我们表明，对于从0.3到20 msun的各种恒星质量，对于从主序列到红色巨型阶段开始的进化阶段，恒星通量加权重力，g_f〜g/teff^4，与绝对强度量级MBOL紧密相关。这种相关性通过恒星进化论预测。我们使用具有精确恒星参数的445颗恒星的样本在观察上确认这种关系。它在MBOL = 9.0 MAG到-8.0 MAG的17个恒星幅度以上，散布在MBOL = -3.0高于-3.0，低于此值的MAG。然后，我们用6.5 mag> 0.5 mag测试了220万颗恒星的关系，其中可用Lamost DR5和Gaia DR2的“批量生产”，但可靠的日志G，Teff和Mbol。我们发现，同样的关系与单星散射〜0.2 mag相同，提供简单的光谱距离估计值良好至约10％。
We show that for a wide range of stellar masses, from 0.3 to 20 Msun, and for evolutionary phases from the main sequence to the beginning of the red giant stage, the stellar flux weighted gravity, g_F ~ g/Teff^4, is tightly correlated with absolute bolometric magnitude Mbol. Such a correlation is predicted by stellar evolution theory. We confirm this relation observationally, using a sample of 445 stars with precise stellar parameters. It holds over 17 stellar magnitudes from Mbol = 9.0 mag to -8.0 mag with a scatter of 0.17 mag above Mbol = -3.0 and 0.29 mag below this value. We then test the relation with 2.2 million stars with 6.5 mag > Mbol > 0.5 mag, where 'mass-produced' but robust log g, Teff and Mbol from LAMOST DR5 and Gaia DR2 are available. We find that the same relation holds with a scatter of ~0.2 mag for single stars offering a simple spectroscopic distance estimate good to ~10 percent.
