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| publication | 23-May-2013 18:41:24 |
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Abundances in the ISM of Star-Forming Galaxies from FUSE Observations: the case of I Zw 18 |
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Publication date: 01 April 2006 Authors: Aloisi, A., et al.
Journal: Space Telescope Science Institute Symposium Series Copyright: CUP We report on the analysis of the FUSE spectrum of the most metal-poor blue compact dwarf (BCD) galaxy I Zw 18. From a simultaneous fitting of HI and metal absorption lines arising from the neutral interstellar medium (ISM), we infer abundances of heavy elements (Fe, O, Si, Ar, and N) which are several times lower than in the HII regions. The only exception is Fe, whose abundance is the same. The abundance pattern of the ISM suggests ancient star formation (SF) activity with an age of at least a Gyr that enriched the H i phase. A more recent episode that started 10 to several 100 Myr ago is responsible for the additional enrichment of alpha-elements and N in the HII regions.Link to Publication: http://www.rssd.esa.int/SYS/include/pubs_display.php?project=PUBDB&id=396110 |
Last Update: 10 January 2006 For further information please contact: SciTech.editorial@esa.int |
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