Sagittarius B2(N), a gold mine to investigate the formation of complex organic molecules

We used ReMocA, a sensitive imaging spectral line survey performed with ALMA over a broad frequency range at high angular resolution, to decipher the chemical composition of hot molecular cores in the high-mass star forming region Sgr B2(N). We derived the column densities of almost 50 (mainly organic) molecules (not counting isotopologs) as well as upper limits for about 150 species toward a compact group of four hot cores located in the sub-region Sgr B2(N2). We use this gold mine to explore the correlations (or lack thereof) between the four hot cores and between these sources and several other hot cores/corinos that have been studied in detail in the inner Galaxy. We also investigate the relationships within various families of molecules. We will report on the main findings of this study. Our goal is to provide useful constraints to astrochemical models in order to improve our understanding of the formation of complex organic molecules in star forming regions.