Program: GS-2019B-Q-219

Jellyfish galaxies, showing eye-catching star-forming knots in their disks and tails, are formed during the intermediate phase of ram-pressure stripping (RPS). They are an ideal target to study the effects of RPS on star formation, particularly by using 2D spectroscopic maps. However, previous IFU studies were limited to jellyfish galaxies in low mass clusters (M_200 < 10^15 M_Sun) which have mild effects of RPS. We propose GMOS/IFU spectroscopic mapping of an extreme jellyfish galaxy, F0083, in a very massive galaxy cluster Abell 2744 (z=0.308, M_200 ~ 3×10^15 M_Sun). The host cluster, Abell 2744, is a dynamic cluster with high X-ray luminosity, so F0083 is expected to suffer from the most extreme RPS among the known jellyfish galaxies. In addition, F0083 is known to have the highest star formation rate among the A2744 galaxies, and hosts exceptionally large and bright knots which can be progenitors of blue compact dwarfs. Thus, F0083 is an excellent target to study the effects of strong RPS on star formation in relation with the origin of blue compact dwarfs. Our specific goal is to investigate star formation rates, kinematics, dynamical states, and ionization mechanisms of each knot in F0083 using the strong emission lines. The proposed IFU observation can improve our understanding of the relation between strong RPS and star formation in jellyfish galaxies.