Kapteyn Astronomical Institute, PO Box 800, 9700 AV Groningen, The Netherlands
2 SRON Laboratory for Space Research, PO Box 800, 9700 AV Groningen, The Netherlands
3 Laboratory for Astronomy and Solar Physics, Code 681, Goddard Space Flight Center, MD, USA
Corresponding author: S. R. Pottasch, email@example.com
Accepted: 19 October 2001
The ISO and IUE spectra of the elliptical nebulae NGC 7662 and NGC 6741 are presented. These spectra are combined with the spectra in the visual wavelength region to obtain a complete, extinction corrected, spectrum. The chemical composition of the nebulae is then calculated and compared to previous determinations. The abundances found are compared to determinations made in other nebulae using ISO data. A discussion is given to see if possible evolutionary effects can be found from the abundance differences.
Key words: ISM: abundances / planetary nebulae: individual: NGC 7662, NGC 6741 / infrared: ISM
© ESO, 2001