Tetsuya Hashimoto

(National Chung Hsing University)

Fast radio bursts (FRBs) are millisecond transients of unknown origin(s) occurring at cosmological distances. Revealing the origin of FRBs is becoming central in astronomy. One way to constrain the FRB origin is to investigate the physical environments of FRBs. If FRBs originate from young progenitors, the environments are more likely gas-rich and star-forming. If FRBs originate from old progenitors, FRBs would preferentially happen in gas-less environments. In this project, we use ALMA data of galaxies that hosted non-repeating FRBs
180924 and 190102. By detecting emission lines from molecular gases and the submillimeter continuum of these galaxies, we investigate the physical environments of FRBs tostrongly constrain their origin. The ALMA observations of FRB host galaxies are rare, and hence, any results from this project would have a high impact.