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Computing Limb-darkening Coefficients from Stellar Atmosphere Models

机译:从恒星大气模型计算变暗系数

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We explore the sensitivity of limb-darkening coefficients computed from stellar atmosphere models to different least-squares fitting methods. We demonstrate that conventional methods are strongly biased to fitting the stellar limb. Our suggested method of fitting by minimizing the radially integrated squared residual yields improved fits with better flux conservation. The differences of the obtained coefficients from commonly used values are observationally significant. We show that the new values are in better agreement with solar limb-darkening measurements, as well as with coefficients reported from analyses of eclipsing binary light curves.
机译:我们探索了由恒星大气模型计算的肢体变暗系数对不同最小二乘拟合方法的敏感性。我们证明常规方法强烈偏向于适合恒星肢体。我们建议的拟合方法是通过最小化径向积分平方的剩余屈服来改善拟合,并更好地保护通量。所获得的系数与常用值的差异在观察上是显着的。我们表明,新值与日照变暗测量值以及日食双光曲线分析报告的系数更好地吻合。

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