Volume 483, Number 2, May IV 2008
|Page(s)||519 - 527|
|Section||Interstellar and circumstellar matter|
|Published online||26 March 2008|
Abundances in planetary nebulae: NGC 6826*
Indian Institute of Astrophysics, Koramangala II Block, Bangalore 560034, India e-mail: email@example.com
2 Kapteyn Astronomical Institute, PO Box 800, 9700 AV Groningen, The Netherlands e-mail: firstname.lastname@example.org
Accepted: 29 February 2008
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.
Key words: ISM: abundances / ISM: planetary nebulae: individual: NGC 6826 / infrared: ISM
© ESO, 2008
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.