99 citations · 289 across the 14 of their papers we have counts for
14 papers
Is the nitrogen-rich source PN K4-47 a true planetary nebula?
Thomas Steinmetz, Tomasz Kaminski, David Jones +3
PN K4-47 is a young planetary nebula that exhibits shock-excited bipolar lobes and a complex molecular environment, with the highest number of molecules detected within a planetary…
Low-ionization structures in planetary nebulae -- IV. The molecular hydrogen counterpart
M. B. Mari, S. Akras, D. R. Gonçalves
Context. Low-ionization structures (LISs), found in all morphological types of planetary nebulae (PNe), are small-scale features prominent in emission from low-ionization species s…
Planetary Nebulae
Orsola De Marco, Isabel Aleman, Stavros Akras
Planetary nebulae are formed by the matter ejected by low-to-intermediate mass stars (~0.8-8 times the mass of the Sun) towards the end of their lives. As hydrogen and then helium…
[Fe II] 1.644m imaging survey of planetary nebulae with low-ionisation structures
Stavros Akras, Isabel Aleman, Denise R. Gonçalves +2
Low-ionisation structures (LISs) are commonly found in planetary nebulae (PNe) but they are still poorly understood. The recent discovery of unforeseen molecular hydrogen gas (H2)…
Photometric candidate selection and spectroscopic confirmation of new PNe and SySts in the Galactic plane
Giovanna Liberato, Denise R. Gonçalves, Luis A. Gutiérrez-Soto +1
About 3,500 planetary nebulae (PNe) are currently known in the Milky Way, which shows a great discrepancy with the expected number for these objects, regardless of the reference us…
Low-ionization structures in planetary nebulae -- III. The statistical analysis of physico-chemical parameters and excitation mechanisms
M. Belén Mari, Stavros Akras, Denise R. Gonçalves
Nearly 30 years after the first detailed studies of low-ionization structures (LISs) in planetary nebulae (PNe), we perform a statistical analysis of their physical, chemical and e…