Lunch talk on Dec. 16, 2024

Studying the Gas Kinematics in Ram Pressure Stripping Galaxies with Integral Field Spectroscopy

Speaker: Rongxin Luo (Guizhou Normal University)

Venue: SWIFAR Building 2111

Time: 12:45 PM, Monday, Dec. 16, 2024

Abstract: 

Ram pressure stripping (RPS) is considered an important mechanism responsible for the evolution of galaxies in high-density environments and especially plays a key role in nearby massive clusters of galaxies. At the same time, the stripped gas will mix with the surrounding intracluster medium, which provides an important laboratory for the study of energy balance and transfer in the multi-phase gaseous medium. In this talk, I will present our recent studies on the gas kinematics of famous RPS galaxy ESO 137-001 with MUSE integral field spectroscopy data. Our observations provide complete coverage of the galaxy region and extended stripped gas tails, which reveal the presence of decreasing velocity gradient and increasing velocity dispersion along the stripping direction, suggesting the turbulence degree of gas is enhanced as it moves away from the galaxy. Combining with the ALMA data, we also compare the velocities and velocity dispersions of molecular gas and ionized gas in the stripped tails, and find connections between the kinematic properties of these two components. Our studies demonstrate the great potential of wide-field integral-field spectroscopy in probing the detailed kinematic properties of RPS galaxies and their stripped tails, which can provide important information for future numerical simulations of RPS.

Report PPT:  SWIFAR_Rongxin Luo.pdf