论文标题
麦哲伦云中古典头孢菌的中红外Leavitt法律
The mid-infrared Leavitt Law for Classical Cepheids in the Magellanic Clouds
论文作者
论文摘要
Cepheid Leavitt Law（LL），也称为周期性关系关系，是组装宇宙距离阶梯的关键工具。通过将来自Spitzer Space望远镜的OGLE-IV目录中的数据与中红外光度法结合在一起，我们已经确定了使用约5000个基本模式的古典模式的麦哲伦云的$ 3.6 $ $ $ $ $ M和$ 4.5 $ $ $ $ $ M lls。使用Monte Carlo Markov链（MCMC）模板拟合程序确定平均幅度，模板光曲线是由这些头样本的子样本构成的，具有完整的，完全采样的光曲线。除了关系的线性外，还测试了大型麦哲伦云系数对各个时期切割的依赖性。 The zero point of the LL was calibrated using the parallaxes of Milky Way Cepheids from the Hubble Space Telescope and Gaia Data Release 2. Our final calibrated relations are $M_{[3.6]} = -3.246(\pm 0.008)(\log(P)-1.0)-5.784(\pm 0.030)$ and $M_{[4.5]} = -3.162（\ pm 0.008）（\ log（p）-1.0）-5.751（\ pm 0.030）$。
The Cepheid Leavitt Law (LL), also known as the Period-Luminosity relation, is a crucial tool for assembling the cosmic distance ladder. By combining data from the OGLE-IV catalogue with mid-infrared photometry from the Spitzer Space Telescope, we have determined the $3.6$ $μ$m and $4.5$ $μ$m LLs for the Magellanic Clouds using around 5000 fundamental-mode Classical Cepheids. Mean magnitudes were determined using a Monte Carlo Markov Chain (MCMC) template fitting procedure, with template light curves constructed from a subsample of these Cepheids with fully-phased, well-sampled light curves. The dependence of the Large Magellanic Cloud LL coefficients on various period cuts was tested, in addition to the linearity of the relationship. The zero point of the LL was calibrated using the parallaxes of Milky Way Cepheids from the Hubble Space Telescope and Gaia Data Release 2. Our final calibrated relations are $M_{[3.6]} = -3.246(\pm 0.008)(\log(P)-1.0)-5.784(\pm 0.030)$ and $M_{[4.5]} = -3.162(\pm 0.008)(\log(P)-1.0)-5.751(\pm 0.030)$.
