论文标题
长期Cepheid Calibrator SV VUL的群集会员资格
Cluster membership for the long period Cepheid calibrator SV Vul
论文作者
论文摘要
经典的头孢虫代表了距离标尺梯子的第一步。本地计算出的哈勃常数与从$ Planck $的结果得出的值之间的张力索赔引发了这些距离校准器的新兴趣。群集成员资格提供了独立的距离测量以及对其出色特性研究的天体物理环境。在这里，我们报告了在SV VUL附近发现一个年轻的开放群集，这是银河系中最具发光的头孢菌之一。 $ GAIA $ DR2数据显示，SV VUL是新集群的明显天文标准和光度法，我们将其命名为Alicante 13。尽管散布，Alicante 13的人口中等良好，并且包含了另外三个发光的星星，一个早期的明亮巨型巨人和两个低光度红色的红色超级巨人。该簇在标称距离为2.5 kpc的大约30 mA老。随着这个年龄的增长，SV VUL的质量应大约$ 10 \：$ m $ _ {\ odot} $，非常适合其发光度，接近最近出色的型号允许的头目的最高光度。
Classical Cepheids represent the first step of the distance scale ladder. Claims of tension between the locally calculated Hubble constant and the values deduced from $Planck$'s results have sparked new interest in these distance calibrators. Cluster membership provides an independent distance measurement, as well as astrophysical context for studies of their stellar properties. Here we report the discovery of a young open cluster in the vicinity of SV Vul, one of the most luminous Cephedis known in the Milky Way. $Gaia$ DR2 data show that SV Vul is a clear astrometric and photometric member of the new cluster, which we name Alicante 13. Although dispersed, Alicante 13 is moderately well populated, and contains three other luminous stars, one early-A bright giant and two low-luminosity red supergiants. The cluster is about 30 Ma old at a nominal distance of 2.5 kpc. With this age, SV Vul should have a mass around $10\:$M$_{\odot}$, in good accordance with its luminosity, close to the highest luminosity for Cepheids allowed by recent stellar models.
