造父变星IRAC波段周期-光度关系的金属丰度依赖性统计检验
Statistical Tests for the Metallicity Dependency of the Synthetic Cepheid Period-Luminosity Relations in IRAC Bands
摘要：
造父变星的中红外（MIR）周期光度（PL）关系在JWST时代将是重要的，因为它有望在2%的精度内导出哈勃常数。预计MIR P-L对金属含量不敏感。在这项工作中，我们测试这一假设的金属丰度独立的IRAC带的P-L关系，通过应用众所周知的统计方法的合成P-L斜率从一系列的脉动模型与已知的金属丰度。统计检验表明，MIR的P-L斜率与金属丰度呈线性关系。
英文摘要：
The mid-infrared (MIR) period-luminosity (P-L) relations for Cepheids will be important in the JWST era, as it holds the promise of deriving the Hubble constant within 2% accuracy. It is expected that the MIR P-L to be insensitive to metallicity. In this work, we test this assumption of metallicity independent of the IRAC band P-L relation by applying well-known statistical methods to the synthetic P-L slopes from a series of pulsating models with known metallicity. The statistical tests suggest that the P-L slopes in MIR are linearly depending on metallicity.
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