Rotation-dominant equilibria of isothermal clouds

Rotating isothermal clouds in equilibrium are classified into two groups: one is in the pressure-dominant (PD) state and the other in the rotation-dominant (RD) state. All the numerical solutions obtained so far, however, belonged essentially to the former group. We found that the latter solutions cannot be obtained as far as the self-consistent-field method of previous authors is employed in computation. In order to investigate whether or not the RD equilibrium state can be attained at the end of the collapse of rotating clouds, we searched and obtained the RD solutions under a thin disc approximation using a new numerical method. (author)