Discovery of extended structures around two evolved planetary nebulae M2โ55 and Abell 2
Discovery of extended structures around two evolved planetary nebulae M2โ55 and Abell 2
Abstract We report a multi-wavelength study of two evolved planetary nebulae (PNs)M2โ55 and Abell 2. Deep optical narrow-band images ([O III], H ฮฑ , and [N II]) of M2โ55 reveal two pairs of bipolar lobes and a new faint arc-like structure. This arc-shaped filament around M2โ55 appears as a well-defined โฆ