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Desmond Jeff

Title: Thermal Properties of the Hot Core Population in Sagittarius B2 Deep South

Abstract: Hot molecular cores are thought to represent a key phase of protostellar evolution and the evolution of the ISM, as the antecedents to ultra-compact HII regions and formation sites of complex organic molecules. However, owing to the complex interplay between gas-phase and grain-surface chemistry in pre and protostellar cores, the temporal and physical evolution of hot cores is still not well understood. The evolution of hot cores is further unexplored in the Milky Way's Central Molecular Zone (CMZ) where, owing to the CMZ’s peculiarly low star formation rate, there are few examples of ongoing star formation. I will report the discovery of 9 new hot cores in the Deep South (DS) region of the star-forming CMZ Cloud Sagittarius B2 (Sgr B2). I will discuss our measurement of the cores' resolved temperature and column density structure using LTE modeling of methanol (CH3OH) lines. The hot cores reveal a warmer and more massive mode of star formation in the CMZ as compared to the Galactic disk and hint at the ongoing formation of what may become a new young massive cluster.