平均大间隔在近地层独立模式拟合中的应用
On the use of the average large separation in surface layer independent model fitting
摘要：
恒星外层的物理学还没有被很好地理解，但这些层对大分离做出了重大贡献。我们使用恒星模型对此进行了量化，并表明其贡献范围从半径外0.1%的6%到半径外5%的30%。因此认为大的分离不应该被用作对表面层独立模型拟合的约束。质量和光度与外层无关，可以用作约束条件，质量由双星或表面重力和半径决定。半径可以用作约束，但具有增强的误差估计。我们简要地考虑了$α$ Cen A的大分离度的确定，发现由表面重力导出的质量比由大分离度导出的质量更接近双星质量。
英文摘要：
The physics of the outer layers of a star are not well understood but these layers make a major contribution to the large separation. We quantify this using stellar models and show that the contribution ranges from 6\% from the outer 0.1\% of the radius to 30\% from the outer 5\%. and therefore argue that the large separation should not be used as a constraint on surface layer independent model fitting. The mass and luminosity are independent of the outer layers and can be used as constraints, the mass being determined from binarity or from surface gravity and radius. The radius can be used as a constraint but with enhanced error estimates. We briefly consider the determination of the large separation for $α$ Cen A and find that mass derived from surface gravity is closer to the binary mass than that derived from the large separation.
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