Binarity has been hypothesised to play an important, if not ubiquitous, role in the formation of
planetary nebulae (PNe). Yet there remains a severe paucity of known binary central stars …

Considerable effort has been applied towards understanding the precise sha**
mechanisms responsible for the diverse range of morphologies exhibited by planetary …

Core-collapse supernova remnants are the gaseous nebulae of galactic interstellar media
(ISM) formed after the explosive death of massive stars. Their morphology and emission …

Nearly 30 yr after the first detailed studies of low-ionization structures (LISs) in planetary
nebulae (PNe), we perform a statistical analysis of their physical, chemical, and excitation …

The planetary nebula known as the Cat's Eye Nebula (NGC 6543) has a complex, point-
symmetric morphology that cannot be fully explained by the current theory of planetary …

We report on the discovery of ETHOS 1 (PN G068. 1+ 11.0), the first spectroscopically
confirmed planetary nebula (PN) from a survey of the SuperCOSMOS Science Archive for …

Models of accretion disks around a star in a binary system predict that the disk will have a
retrograde precession with a period a factor of∼ 10 times the orbital period. If the star+ disk …

Fast highly collimated outflows, including bipolar knots, jetlike features, and point-symmetric
filaments or strings of knots, are common in planetary nebulae (PNe). These features …

The propagation of a shock wave into a medium is expected to heat the material beyond the
shock, producing noticeable effects in intensity line ratios such as [O iii]/Hα. To investigate …

ABSTRACT A significant fraction of planetary nebulae (PNe) exhibit collimated outflows,
distinct narrow kinematical components with notable velocity shifts with respect to the main …