An overview investigation of Be/Shell stars

Be/Shell stars as hot massive type stars are one of the most important stellar groups through the global universe contents. They are important sources of UV photons, so they are playing an important role in the heating and ionizing the interstellar environment up to few hundred parsecs. We here represent an overview investigation of the Be/Shell stars using the last decades “ground and space” observations with high sensitivity, high signal to noise ratio and the new applied techniques in addition to the recent developments of advanced models.