论文标题
旋转星的合成光谱
Synthetic Spectra of Rotating Stars
论文作者
论文摘要
许多早期型恒星具有扁平表面，空间温度变化和光谱线扩展，表明旋转速度较大。旋转应该对此类恒星的完整光谱产生重大影响。为了从光谱中推断结构和生活历史参数，必须在相应恒星模型的二维表面上整合特定的强度。为此，我们提供标准杆（油漆旋转星的大气） - 一种基于结合固体旋转，Roche质量分布和重力和能量通量共线性的模型的集成方案（https://github.com/mlipatov/mlipatov/paint_at_atmospheres）。该方案具有方位角积分的封闭式表达，纵向积分的高阶数值近似以及在旋转速率下的表面有效温度的精确计算，高达开普勒极限的99.9％。该方案的扩展包括合成的色量图和行星传输曲线。
Many early-type stars have oblate surfaces, spatial temperature variations, and spectral line broadening that indicate large rotational velocities. Rotation ought to have a significant effect on the full spectra of such stars. To infer structural and life history parameters from their spectra, one must integrate specific intensity over the two-dimensional surfaces of corresponding stellar models. Toward this end, we offer PARS (Paint the Atmospheres of Rotating Stars) -- an integration scheme based on models that incorporate solid body rotation, Roche mass distribution, and collinearity of gravity and energy flux (https://github.com/mlipatov/paint_atmospheres). The scheme features a closed-form expression for the azimuthal integral, a high-order numerical approximation of the longitudinal integral, and a precise calculation of surface effective temperature at rotation rates up to 99.9% of Keplerian limit. Extensions of the scheme include synthetic color-magnitude diagrams and planetary transit curves.
