3 papers
astro-ph.SR2026
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…
astro-ph.SR2026
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…
astro-ph.GA2025
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…