Sulfur Dioxide Outgassing and Its Atmospheric Impacts Across Habitable Zone Exoplanets

With the growing diversity of detected terrestrial exoplanets, understanding their evolutionary pathways is essential for characterizing and categorizing these worlds. Sulfur dioxide (SO₂), a gas commonly produced by volcanic and biological activity on Earth, has significant implications for the atmospheric and surface conditions of terrestrial exoplanets. In this study, we present three vertical mixing ratio grids for SO₂, each representing different planetary scenarios within the middle and outer habitable zones. For each case, we explore the relationship between atmospheric SO₂ abundance and water liquid or vapor content. We further vary the SO₂ outgassing rate to examine its dependence on water availability and stellar type, providing insight into potential observables for upcoming missions such as JWST and HWO. Finally, we discuss how these grids can inform sensitivity requirements for future UV spectroscopy instruments aimed at characterizing exoplanetary atmospheres.