The future of solar system observations with the ALMA Wideband Sensitivity Upgrade

ALMA has proven to be an invaluable tool for studying the origin and evolution of the building blocks of planetary systems, both in our solar system and beyond. ALMA's high sensitivity and large spectral coverage have provided us with an unprecedented view of many solar system objects. For instance, ALMA has allowed us to study the chemical composition of cometary comae in great detail, including determining variations in the spatial distribution of different species. However, because of the varying nature of comets, they remain challenging to observe and obtain reliable abundance estimates for, even with ALMA. Observations of comets will therefore greatly benefit from ALMA's Wideband Sensitivity Upgrade, offering increased sensitivity to access fainter isotopologue lines, reducing uncertainties on abundance ratios by enabling simultaneous observations of more species of interest in a single spectral setup, and by providing high resolution line profiles without the need to sacrifice bandwidth.