FURTHER MAPPING OF THE RADIO-EMISSION FROM MASSIVE YOUNG STELLAR OBJECTS

We present high-resolution radio maps at a frequency of 1.6 GHz made with the MERLIN array of the luminous young stellar objects Cep A2 and LkH alpha 101. The elongation seen previously in Cep A2 appears to extend even farther in our map, supporting a jet interpretation for the morphology of this source. We discuss this and alternative mechanisms in the context of the large-scale outflows in the Cep A region. The 1.6 GHz map of LkH alpha 101 is more symmetric, although it does show a bright bar of emission at P.A. approximate to 135 degrees plus other extended structures. This map is compared with the previous ones, and overall the ionized wind from this object appears to be far from homogeneous.