Abstract
Contribution of Local azimuthal magnetic field of a star in the leakage of field free upcoming mass from different optical depths of both types of bright dots PUDs and CUDs has been revealed involving experimental data of B, , The leakage activity of particles is seen to be more enhanced for PUDs than CUDs by a factor of 1.6 at top log 500 = -2.5. Dynamic anatomy of upcoming mass in both types of UDs is unraveled and PUDs are found to be more active from point of view of electromagnetic dynamics than CUDs.