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Journal of Physical Studies 12(1), Article 1902 [8 pages] (2008)
DOI: https://doi.org/10.30970/jps.12.1902 THE OPTIMIZED PHOTOIONIZATION MODELLING OF PLANETARY NEBULA NGC 6826N. V. Havrylova1, V. V. Holovatyy2, B. Ya. Melekh3
Ivan Franko National University of Lviv, Department for Astrophysics, |
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The images of many planetary nebulae have inhomogeneity structure. Our investigations were held using the nebula NGC 6826 because its spectrum was examined very well. The chemical composition of this nebula derived using the empirical expressions were compared with the corresponding one derived by the optimized photoionization models calculations. By comparing these results it is shown that data obtained from calculations of the optimization models are larger than the corresponding data obtained by the diagnostic method. We suggest that the results of optimized modelling are more accurate because they reproduce the observed spectra of NGC 6826. The variations of the optimal values of free parameters over the nebula volume indicate the homogeneity distribution of abundances of different chemical elements.
PACS number(s): 98.38.Am, 98.38.Ly