Chemical Diversity of an Isolated Massive Star Formation Environment

We investigate the chemical complexity and diversity of the massive protostar G28.20-0.05, which appears to be isolated on the protocluster scale. Our analysis is based on data obtained from the Atacama Large Millimeter/submillimeter Array (ALMA) 1.3 mm observations, achieving an angular resolution of 0.2′′ (~1000 au). Our observations reveal the presence of a wide array of molecules, including oxygen-bearing (e.g., H2CO, CH3OH, CH3OCH3), sulfur-bearing (SO2, H2S), and nitrogen-bearing (e.g., 13CH3CN, C2H5CN) molecules. Within the central region near the protostar, we have identified three distinct hot cores. In this poster, we focus on presenting the 1.3 mm continuum of this isolated massive protostar, discussing its chemical properties, and analyzing the spatial distributions of various molecules. This source exhibits a rich chemical composition, and the hot cores seem to be externally heated. High-resolution maps provide detailed insights into the distribution of different molecular species, aiding our understanding of their potential chemical origins and correlations. Finally, we tentatively identify evidence of a temperature gradient extending from the central source to the hot core environment.