Physics
Scientific paper
Feb 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sgyu.conf..133t&link_type=abstract
Studies of Galaxies in the Young Universe with New Generation Telescope, Proceedings of Japan-German Seminar, held in Sendai, Ja
Physics
Scientific paper
Galaxies moving in a cluster environment are affected by the ram pressure of the intra-cluster gas. The ram pressure pushes the galaxy from one side of the gas disc. If it is too strong, the galactic gas is swept away from the galaxy. In the present paper I will show that before the galactic gas is swept away by the ram pressure, Rayleigh-Taylor instability is induced in the gas disc. When the ram pressure is normal to the gas disc, the interface between the galactic gas and the wind is pushed toward the mid plane of the galactic disc. As soon as the interface crosses the bottom of the gravitational potential at the mid plane, Rayleigh-Taylor instability sets on. First, holes are formed in the gas disc, through which the intra-cluster gas passes the gas disc. As the instability develops, the holes expand sweeping the gas at the edge to form large gas clumps. I present results of numerical simulation to follow the development of the instability. The formation of gas clumps in the gas disc helps the gas to stand the ram pressure stripping.
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