Program: GN-2021A-Q-205

Jellyfish galaxies show peculiar star-forming knots and tails because strong ram-pressure stripping (RPS) triggers their star formation. These galaxies provide a snapshot of the intermediate phase of RPS. Thus, jellyfish galaxies are an ideal target to study the effects of RPS on the star formation activity of galaxies. Spectroscopic mapping using IFU observations is useful to study jellyfish galaxies, but previous IFU studies have been limited to low-mass galaxy clusters (M_200 < 10^15 M_Sun) where the degree of RPS is mild. Our previous GMOS/IFU observations have revealed that jellyfish galaxies in massive clusters (M_200 > 10^15 M_Sun) exhibit much stronger star formation activity than those in low-mass clusters. This implies that stronger RPS trigger more active star formation in jellyfish galaxies. In order to expand our sample, we propose GMOS/IFU spectroscopic mapping of two more jellyfish galaxies in the MACS clusters. The MACS clusters are very massive and X-ray luminous (L_X > 10^45 erg/s), which implies that jellyfish galaxies in these clusters undergo much stronger RPS than those in low-mass clusters. Our goal is to investigate the star formation rates, dynamical states, kinematics, ionization mechanisms, and physical properties of the star-forming knots in jellyfish galaxies. The proposed IFU observations, in combination with our previous programs, will enhance our understanding of the relation between RPS and star formation activity in jellyfish galaxies in massive clusters.