Resumen de Contribución a la teoría de Chandrasekhar sobre la dinámica de los sistemas estelares
Within Chandrasekhar's theory on the dynamics of stellar systems, the shape of regular extragalactic nebulae is explained. Starting from the mentioned author's differential equations several important theorems are proved, which allow to attack the problem from a new point of view. Al first approximation, it is supposed that a regular extragalactic nebula is a stellar system the velocity field of the local centroids of which is solenoidal, and, in this assumption, it is explained the shape of these objects by obtaining the equation of their equi-density surfaces. A quantitative comparison between theory and observation is only possible in a particular case, and in this case it is reachead a perfect agreement between the observed shape and the calculated one for the meridian section of two nebulae. Such an agreement induces to propose a mathematical definition of regular extragalactic nebula.
