Abundances in planetary nebulae: NGC 6826
Abstract
Aims: We determine the chemical abundances and other parameters of the nebula NGC 6826 and its central star.
Methods: We present new ISO spectra and combine them with archival IUE and optical spectra from the literature to get a complete, extinction-corrected, spectrum. The chemical composition of the nebula is then calculated in two ways, first by directly calculating and adding individual ion abundances, and second by building a model nebula that will reproduce the observed spectrum.
Results: The results of these two methods are compared. In addition, we discuss the star exciting the nebula.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- May 2008
- DOI:
- 10.1051/0004-6361:200809380
- Bibcode:
- 2008A&A...483..519S
- Keywords:
-
- ISM: abundances;
- ISM: planetary nebulae: individual: <ASTROBJ>NGC 6826</ASTROBJ>;
- infrared: ISM