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Globular Clusters are among the oldest objects in the Galaxy, thus theirresearchers are key to understanding the processes of evolution and formationthat the galaxy has experienced in early stages. Spectroscopic studies allow usto carry out detailed analyzes on the chemical composition of GlobularClusters. The aim of our research is to perform a detailed analysis of chemicalabundances to a sample of stars of the Bulge Globular Cluster NGC 6553, inorder to determine chemical patterns that allow us to appreciate the phenomenonof Multiple Population in one of the most metal-rich Globular Clusters in theGalaxy. This analysis is being carried out with data obtained by FLAMES/GIRAFFEspectrograph, VVV Survey and DR2 of Gaia Mission. We analyzed 20 Red HorizontalBranch Stars, being the first extensive spectroscopic abundance analysis forthis cluster and measured 8 chemical elements (O, Na, Mg, Si, Ca, Ti, Cr andNi), deriving a mean iron content of $[Fe/H] = -0.10\pm0.01$ and a mean of$[\alpha/Fe] = 0.21\pm0.02$, considering Mg, Si, Ca and Ti (errors on themean). We found a significant spread in the content of Na but a small ornegligible in O. We did not find an intrinsic variation in the content of$\alpha$ and iron-peak elements, showing a good agreement with the trend of theBulge field stars, suggesting a similar origin and evolution.

Chemical analysis of the Bulge Globular Cluster NGC 6553