New Metal-poor Globular Clusters in the Galactic Bulge: The Elephant Graveyard

Abstract

We select metal-poor GC candidates because of the presence of RRL and T2C variable stars, using the catalogs of Pietrukowicz et al. (2015), Gran et al. (2016), and R. Contreras Ramos et al. (2017, in preparation), building density maps and looking for local overdensities. These are in general tight groups composed of a couple or more RRL and/or T2Cs within a radius of 2 arcmin. Also, at least two of these objects should have magnitude consistent with similar distances. We find 38 new GC candidates in total, designated Minniti 23 to 60 (Minni for short since they are small cluster candidates of low-luminosity). Note that Minniti 22 was already listed as a candidate by Minniti et al. (2017b).