VizieR Online Data Catalog: Extreme abundance discrepancy factors in PNe (Wesson+, 2018)
Abstract
We obtained observations of 42 planetary nebulae in ESO programmes 093.D-0038(A) and 096.D-0080(A). The nebulae in our sample were southern hemisphere objects selected from a list of PNe with close binary central stars. The observations were carried out during service time with the FORS2 instrument mounted on the ESO VLT's UT1 Antu telescope (Appenzeller et al. 1998Msngr..94....1A). The programmes were designated as filler programmes, designed to be performed under any conditions, including periods of bad weather (seeing greater than 2' and/or clouds). Because of this, a number of our targets were observed during times of poor seeing and transparency, and nebular emission was sometimes only very weakly detected. We detected strong recombination line emission in 8 objects, while in 20 objects, the spectra were deep enough to obtain collisionally excited line abundances but not recombination line abundances. In 14 objects, no abundances could be measured.
(4 data files).- Publication:
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VizieR Online Data Catalog
- Pub Date:
- May 2022
- Bibcode:
- 2022yCat..74804589W
- Keywords:
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- Abundances;
- Mass loss;
- Interstellar medium;
- Planetary nebulae;
- Stars: double and multiple