10-GHz observations of the unusual supernova remnant CTB80 associated with jet-like features

The unusual supernova remnant CTB80 was mapped in the radio continuum emmission at 10 GHz using the high-surface accuracy 45 m telescope at the Nobeyama Radio Observatory. The map reveals a compact central core, a plateau-like ridge close to the core, and three extended ridges emerging from the central region. The radio spectrum is flat over the core and plateau, while it is steep over the extended component. It is found that the narrower, shorter, and brighter a ridge is, the flatter is the spectrum, and the spectrum steepens towards the edge along each ridge. These features are reasonably understood, if the three ridges and the plateau are jets emerging from the core which involves a stellar remnant, possibly a neutron star, injecting high-energy electrons into the jets. (author)