Asymmetric Distribution of Gas in the Large Magellanic Cloud and Dynamical Condition for Globular Cluster Formation

Highly asymmetric distributions of H i and CO gases in LMC (Large Magellanic Cloud) are reproduced by taking into account hydrodynamical collision between LMC and SMC (Small Magellanic Cloud) 0.15 to 0.2 Gyr ago. Two-valued rotation curves in H i gas are due, respectively, to gas clouds accelerated by collision and to those escaped therefrom. It is also concluded that a large-scale noncircular motion of > 50 to 100 km s(-1) and a resultant compression of > 10(4) MO in mass-scale are necessary conditions for globular cluster formation from interstellar gas. This process seems to be independent of the chemical abundance of heavy elements in the range -2.0< [Fe/H] <0.