Title of article
Spitzer finds cosmic neon’s and sulfur’s sweet spot: part III, NGC 6822
Author/Authors
R. H. Rubin، نويسنده , , I. A. McNabb، نويسنده , , J. P. Simpson، نويسنده , , R. J. Dufour، نويسنده , , A. W. A. Pauldrach، نويسنده , , S. W. J. Colgan، نويسنده , , T. W. Craven، نويسنده , , E. D. Gitterman، نويسنده , , C. C. Lo، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2009
Pages
2
From page
249
To page
250
Abstract
We observed several H ii regions in the dwarf irregular galaxy NGC 6822 using the infrared spectrograph on the Spitzer Space Telescope. Our aim is twofold: first, to examine the neon to sulfur abundance ratio in order to determine how much it may vary and whether or not, it is fairly ‘universal’; second, to discriminate and test the predicted ionizing spectral energy distribution between various stellar atmosphere models by comparing with our derivation of the ratio of fractional ionizations involving neon and sulfur. This work extends our previous similar studies of H ii regions in M83 and M33 to lower metallicities.
Keywords
ISM: abundances , stars: atmospheres , galaxies: individual (NGC 6822) , H II regions
Journal title
Proceedings of the International Astronomical Union
Serial Year
2009
Journal title
Proceedings of the International Astronomical Union
Record number
675030
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