Equivalent widths for six M67 stars

The benchmark open cluster M67 is known to have solar metallicity and similar age as the Sun. It thus provides us a great opportunity to study the properties of solar twins, as...基准疏散星团（open cluster）M67已知具有太阳金属丰度（solar metallicity），且年龄与太阳相近。因此，该星团为我们研究太阳孪生星（solar twins）的相关特性提供了绝佳契机，正如……