Novae and U Gem Stars in Globular Clusters LITERATURE CITED THE NORMAL COLOR INDICES AND COLOR EXCESSES OF. , l -0.5 0.0 0.5 1.0 1.5 Fig. 1. Position in the Hertzspmng-Russell diagram of close binary stars that are members of globular and old open clusters. ... The values of the proper motion and radial velocity are not known for the star IR Car, so that it might not be a member of theanbsp;...