52 citations · 170 across the 12 of their papers we have counts for
6 papers · 1 filter
Opening PANDORA's box: APEX observations of CO in PNe
L. Guzman-Ramirez, A. I. Gomez-Ruiz, H. M. J. Boffin +5
Context. Observations of molecular gas have played a key role in developing the current understanding of the late stages of stellar evolution. Aims. The survey Planetary nebulae AN…
Abundances in Galactic Bulge planetary nebulae from optical, ultraviolet and infrared observations
Christina L. Smith, Albert A. Zijlstra, Krzysztof M. Gesicki +1
Iron suffers from high levels of depletion in the highly ionized environments of planetary nebulae, making the direct determination of undepleted elemental iron abundances difficul…
ALMA reveals sunburn: CO dissociation around AGB stars in the globular cluster 47 Tucanae
Iain McDonald, Albert A. Zijlstra, Eric Lagadec +15
ALMA observations show a non-detection of carbon monoxide around the four most luminous asymptotic giant branch (AGB) stars in the globular cluster 47 Tucanae. Stellar evolution mo…
A molecular line survey of a sample of AGB stars and planetary nebulae
Christina L. Smith, Albert A. Zijlstra, Gary A. Fuller
A millimeter molecular line survey of three carbon-rich AGB stars and two oxygen-rich planetary nebulae has been carried out over the frequency range 80.5-115.5 GHz. Sixty eight di…
Zinc abundances of planetary nebulae
Christina L. Smith, Albert A. Zijlstra, Harriet L. Dinerstein
Zinc is a useful surrogate element for measuring Fe/H as, unlike iron, it is not depleted in the gas phase media. Zn/H and O/Zn ratios have been derived using the [Zn IV] emission…
A new HCN maser in IRAS 15082-4808
C. L. Smith, A. A. Zijlstra, G. A. Fuller
We have identified a new vibrational HCN maser at 89.087 GHz in the asymptotic giant branch (AGB) star IRAS 15082-4808, a maser which is thought to trace the innermost region of an…