Optical Observations of Supernova Remnants Simeiz 59 and W28

Abstract

As a part of the program of investigation of kinematics and physical conditions in supernova remnants, detailed interferometric observations of two new objects were carried out. The first is the nebula Simeiz 59 (Sharpless 104); its size (diameter) is 8′, identified with radiosource G 74.8+06 (see Figure 1). The second is a very faint filamentary nebula in the central region of the non-thermal radio source W28; its size (diameter) is about 30′ (see Figure 2 from Milne and Wilson (1971)). In both cases an expansion of the supernova optical remnants was found. The velocity of expansion and radial velocity were evaluated and some conclusions about their nature were drawn.

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