论文标题
基于Gaia和VMC@Vista观测值的头孢虫距离
Cepheid distances based on Gaia and VMC@VISTA observations
论文作者
论文摘要
我们基于大麦芽岩云（LMC）中的4500多个头孢菌的样本，在V，J，KS频段中介绍了新的准确的周期亮度（PL）和周期 - wesenheit（PW）关系，其光度计是在Vista Magellanic Clouds（VMC）调查的上下文中获得的。这些数据的出色精度使我们能够研究LMC的几何形状，并为半乳酸外距离研究建立固体基线。为了校准这些PL/PW关系的零点，我们采用了Gaia数据发布2次视差，以超过2000个银河系的状态。简要讨论了对$ H_0 $的测量的影响。
We present new accurate Period-Luminosity (PL) and Period-Wesenheit (PW) relations in the V,J,Ks bands based on a sample of more than 4500 Cepheids in the Large Magellanic Cloud (LMC) whose photometry was obtained in the context of the VISTA Magellanic Clouds (VMC) Survey. The excellent precision of these data allows us to study the geometry of the LMC and to establish a solid baseline for extra-galactic distance scale studies. To calibrate the zero points of these PL/PW relations, we adopted Gaia Data Release 2 parallaxes for more than 2000 Milky Way Cepheids. The implications for the measurement of $H_0$ are briefly discussed.
