Abstract
Observations of dwarf irregular galaxies show no significant metal abundance gradients throughout the galaxies at a generally low abundance between 1/40 and 1/3 Z/Z ⊙. Additionally, in several starburst dwarf galaxies (SBDGs) large HI reservoirs envelope the luminous galactic body (e.g. in NGC 4449 and I Zw 18) and obtrude that the starburst is fuelled by enhanced gas infall. Current SBDGs are also characterized by superwinds or by large expanding X-ray plumes. These chemical peculiarities can be explained by chemodynamical evolutionary simulations of dwarf galaxies that show large-scale mixing of gas phases by outflow and mixing of metal-enriched and expelled supernova (SN type II) gas with almost pristine or slightly metal-enriched infalling clouds from the gas envelope.
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© 2001 Springer Science+Business Media Dordrecht
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Rieschick, A., Hensler, G. (2001). Chemodynamical Mixing Cycles in Dwarf Galaxies. In: Vílchez, J.M., Stasińska, G., Pérez, E. (eds) The Evolution of Galaxies. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-3313-7_24
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DOI: https://doi.org/10.1007/978-94-017-3313-7_24
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-5821-8
Online ISBN: 978-94-017-3313-7
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