The Role of Metallicity in the Chemical Evolution of Star-Forming Regions

Takashi Shimonishi

Published 2024-11-07Version 1

Understanding the interstellar chemistry in low-metallicity environments is crucial to unveil physical and chemical processes in the past Galaxy or those in high-redshift galaxies, where the metallicity was significantly lower compared to the present-day solar neighborhood. This is also important for the understanding of the diversity of the chemical evolution in various regions of our Galaxy. Nearby low-metallicity laboratories, such as the outskirts of our Galaxy, the Large and Small Magellanic Clouds, and the other gas-rich dwarf galaxies in the Local Group, will provide important insights for this purpose. In the last decade, there has been great progress in astrochemical studies of interstellar molecules in low-metallicity star-forming regions. Do molecular abundances simply scale with the metallicity? If not, which processes govern the chemistry in the low-metallicity interstellar medium? In this proceeding, I will discuss the role of metallicity in the chemical evolution of star-forming regions based on recent observations of interstellar molecules in low-metallicity environments.