NAU Harvester System
On determination of chemical composition of hii region in blue compact dwarf galaxies
Вісник астрономічної школи
View Archive Info| Field | Value | |
| Title |
On determination of chemical composition of hii region in blue compact dwarf galaxies
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| Creator |
Melekh B.Ya.
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| Date |
2000
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| Source |
Astronomical School’s Report, 2000, Volume 1, Issue 2, P. 111-114
2411-6602 |
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| Identifier |
http://astro.nau.edu.ua/papers/AstSR_2000_Vol_1_Iss_2_P_111.pdf
10.18372/2411-6602.01.2111 |
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| Language |
ru
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| Description |
We have collected empirical expressions for gaseous nebulae chemical composition determination from different sources. We obtained chemical composition for 10 HII regions in Blue Compact Dwarf Galaxies (BCDG) using planetary nebulae (PN) ionization correction factors (ICF’s) on the base of observational spectra relative intensities from these objects. Obtained compositions were compared and analyzed with results from different authors. We built photoionization models of this HII regions in BCDG with chemical composition determined in [20] and ionization emission spectra, obtained on the base of observed fluxes in Нβ, λ4471НеІ, λ4686 НеІІ lines [6]. Predicted spectra of photoionized models were used for relative ionic abundances determination in these objects. Obtained relative ionic abundances were used for chemical compositions determination from collection of empirical expressions. The chemical abundance obtained from every tested expressions were compared with correspond abundance specified in photoionization model. We conclude, that it is necessary to build a photoionization grid for HII regions in BCDG for ICF’s in these objects determination.
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| Publisher |
National Aviation University
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| Format |
application/pdf
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