On the use of the average large separation in surface layer independent model fitting and mass estimation
On the use of the average large separation in surface layer independent model fitting and mass estimation
复制标题
平均大间距在表层独立模型拟合和质量估计中的应用
DOI：
10.1051/0004-6361/201424353
复制
发表时间：
2014
影响因子：
6.5
通讯作者：
I. Roxburgh
中科院分区：
文献类型：
--
作者：
I. Roxburgh
星星外层的物理学还不太清楚，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。我们简要地考虑了大分离的$\alpha$ Cen A的测定，发现来自表面重力的质量比来自大分离的质量更接近双星质量。
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 $\alpha$ Cen A and find that mass derived from surface gravity is closer to the binary mass than that derived from the large separation.
星震模型拟合中小距与大距比的应用
影响因子：
6.5
作者：
Roxburgh I
通讯作者：
Roxburgh I