论文标题
双辐射模式的星空学$δ$ scuti star bp pegasi
Asteroseismology of the double-radial mode $δ$ Scuti star BP Pegasi
论文作者
论文摘要
使用ASAS数据，我们确定高振幅$δ$ sct Star BP Pegasi的脉动频率。分析仅揭示了两个已知的独立频率。根据多色strömgren光度法，我们独立地发现，这两个频率只能与径向模式相关联，径向模式，根据频率比，这是基本的和第一个泛音模式。拟合两个频率的模型在很大程度上取决于不透明度数据。对于混合长度参数$α_ {\ rm Mlt} \大约0.5 $的低值，只有在观察到的误差框中才能捕获后进化后的蛋白石地震模型。当我们将$α_ {\ rm Mlt} $增加到至少2.0时，地震OP和Oplib模型只能到达错误框。然后，在我们的地震建模中包括非绝热参数$ f $，我们采用基于蒙特卡洛的贝叶斯分析来限制各种参数。
Using the ASAS data, we determine the pulsational frequencies of the high-amplitude $δ$ Sct star BP Pegasi. The analysis revealed only the two known, independent frequencies. On the basis of multicolour Strömgren photometry, we independently find that both frequencies can only be associated with radial modes which, according to the frequency ratio, are fundamental and first overtone modes. The models fitting the two frequencies depend strongly on the opacity data. For low values of the mixing length parameter $α_{\rm MLT}\approx 0.5$, only the OPAL seismic models in the post-main sequence phase of evolution are caught within the observed error box. Seismic OP and OPLIB models can only reach the error box if we increase $α_{\rm MLT}$ to at least 2.0. Then, including the non-adiabatic parameter $f$ into our seismic modelling, we constrain various parameters, employing Monte Carlo-based Bayesian analysis.
