VVV CL001: A strong candidate for the most ancient star cluster in the Galaxy
Finding the oldest globular cluster of the Galaxy is important to constrain a lower limit on the age of the Galaxy and the Universe. VVV CL001 $( l,b = 5.26^̧irc,0.77^̧irc )$ is perhaps the most metal-poor (̊m Fe/H ∼-2.2 dex) globular cluster in the Galactic bulge and a promising candidate to be the oldest one in the e...