3 citations · 6 across the 8 of their papers we have counts for
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Nickel- and iron-rich clumps in planetary nebulae: New discoveries and emission-line diagnostics
K. Bouvis, S. Akras, H. Monteiro +7
Integral field spectroscopy (IFS) offers a distinct advantage for studying extended sources by enabling spatially resolved emission maps for several emission lines without the need…
Integral field spectroscopy of the planetary nebula NGC 3242 and the puzzling nature of its low ionization structures
L. Konstantinou, S. Akras, J. Garcia-Rojas +7
The physico-chemical properties of the planetary nebula (PN) NGC 3242 are investigated in both 1D and 2D, using Integral Field Unit (IFU) data. This PN has a complex morphology wit…
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)…
Detection of the [C I] 8727 emission line. Low-ionization structures in NGC 7009
Stavros Akras, Hektor Monteiro, Jeremy R. Walsh +5
We report the first spatially resolved detection of the near-infrared [C I] 8727 emission from the outer pair of low-ionization structures in the planetary nebula NGC 7009 from…