The giant vortices near the galactic corotation radius from 21 cm line properties

Abstract

The wave density theory predicts giant vortices in the corotation region of spiral galaxies (we interpretate the 21 cm line profiles of neutral hydrogen emission using 4-arm spiral model of the Galaxy) the whole 21 cm line profile is used. The centre of giant anticyclone is found near the Sun position and its location determines the value of the corotation radius.