论文标题
从Ogle银河凸出样品中的多模径向脉动的高振幅三角洲Scuti星的建模
Modeling of multimode radially pulsating High-Amplitude Delta Scuti stars from the OGLE Galactic bulge sample
论文作者
论文摘要
得益于相对牢固的模式识别（仅基于周期比率），在至少三种径向模式下脉动的高振幅Delta Scuti恒星是紫sperosisic推断的有希望的目标。在这项研究中，我们使用了可能同时在三个或四个径向模式中脉动的OGLE内部凸起场中最多的hads样本。我们已经沿进化轨迹计算了脉动模型的网格，并通过匹配其脉动周期和周期比来确定恒星的物理参数。对于176个HADS，我们确定了物理参数，即质量，亮度，有效温度，金属性和年龄。我们介绍物理参数的分布并讨论其属性。我们为SX腓尼基星星选择了16个候选人。
Thanks to relatively firm mode identification, possible based on period ratios only, High Amplitude Delta Scuti Stars pulsating in at least three radial modes are promising targets for asteroseismic inference. In this study we used the most numerous sample of HADS from the OGLE inner bulge fields that likely pulsate in either three or four radial modes simultaneously. We have computed a grid of pulsation models along evolutionary tracks and determined the physical parameters of stars by matching their pulsation periods and period ratios. For 176 HADS we determined physical parameters, i.e. masses, luminosities, effective temperatures, metallicities and ages. We present the distribution of physical parameters and discuss their properties. We selected 16 candidates for SX Phoenicis stars.
