98 citations · 131 across the 9 of their papers we have counts for
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bHROS high spectral resolution observations of PN forbidden and recombination line profiles
M. J. Barlow, A. S. Hales, P. J. Storey +3
We have acquired high spectral resolution observations (R=150,000) of the planetary nebulae NGC 7009 and NGC 6153, using bHROS on Gemini South. Observations of this type may provid…
Unravelling the chemical inhomogeneity of PNe with VLT FLAMES integral-field unit spectroscopy
Y. G. Tsamis, J. R. Walsh, D. Pequignot +3
Recent weak emission-line long-slit surveys and modelling studies of PNe have convincingly argued in favour of the existence of an unknown component in the planetary nebula plasma…
Abundances of s-process elements in planetary nebulae: Br, Kr & Xe
Y. Zhang, R. Williams, E. Pellegrini +5
We identify emission lines of post-iron peak elements in very high signal-to-noise spectra of a sample of planetary nebulae. Analysis of lines from ions of Kr and Xe reveals enhanc…
Fe/Ni ratio in the Ant Nebula Mz 3
Y. Zhang, X. -W. Liu
We have analyzed the [Fe II] and [Ni II] emission lines in the bipolar planetary nebula Mz~3. We find that the [Fe II] and [Ni II] lines arise exclusively from the central regions.…
Chemical abundances for Hf 2-2, a planetary nebula with the strongest known heavy element recombination lines
X. -W. Liu, M. J. Barlow, Y. Zhang +2
We present high quality optical spectroscopic observations of the planetary nebula (PN) Hf 2-2. The spectrum exhibits many prominent optical recombination lines (ORLs) from heavy e…