论文标题
使用$δ$ scuti星星确定年轻开放群集的地震年龄$α$
Determining the seismic age of the young open cluster $α$ Per using $δ$ Scuti stars
论文作者
论文摘要
在这项工作中，我们旨在使用地震指数来限制年轻开放群集Melotte 20（称为$α$的年龄）。该方法包括以下步骤：1）在开放群集场中提取恒星样品的频率含量。 2）使用不同的技术（例如傅立叶变换，自相关函数，频率差异的直方图和échelle图）搜索$δ$ SCUTI候选频谱的可能规律性。 3）通过将其与代表$Δ$ SCUTI恒星的Asterosic Models的网格进行比较，将所选恒星的年龄通过物理参数和地震指数来限制。 4）找到这些恒星之间可能的常见年龄以确定簇的年龄。我们使用多模型进行了脉动分析，这是本文介绍的快速，准确和强大的开源代码。结果是每年$α$的年龄可能在96至100 MYR之间。过去，这是对不同技术的改进。因此，我们表明，太空星星学能够在年轻的开放群体的约会中采取重要步骤。
In this work we aim at constraining the age of the young open cluster Melotte 20, known as $α$ Per, using seismic indices. The method consists of the following steps: 1) Extract the frequency content of a sample of stars in the field of an open cluster. 2) Search for possible regularities in the frequency spectra of $δ$ Scuti candidates, using different techniques, such as the Fourier transform, the autocorrelation function, the histogram of frequency differences and the échelle diagram. 3) Constrain the age of the selected stars by both the physical parameters and seismic indices by comparing them with a grid of asteroseismic models representative of $δ$ Scuti stars. 4) Find possible common ages between these stars to determine the age of the cluster. We performed the pulsation analysis with MultiModes, a rapid, accurate and powerful open-source code, which is presented in this paper. The result is that the age of $α$ Per could be between 96 and 100 Myr. This is an improvement over different techniques in the past. We therefore show that space astroseismology is capable of taking important steps in the dating of young open clusters.
