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dc.contributor.authorLisenfeld , Ute 
dc.contributor.authorRelaño Pastor, Mónica 
dc.contributor.authorVílchez, José
dc.contributor.authorBattaner López, Eduardo 
dc.contributor.authorHermelo, Israel
dc.date.accessioned2013-10-09T12:22:57Z
dc.date.available2013-10-09T12:22:57Z
dc.date.issued2008
dc.identifier.citationLisenfeld, U.; et al. Dust properties and distribution in dwarf galaxies. Proceedings of the International Astronomical Union, 4(S255): 260-264 (2008). [http://hdl.handle.net/10481/28394]es_ES
dc.identifier.issn1743-9213
dc.identifier.issn1743-9221
dc.identifier.otherarXiv:0808.1953v1
dc.identifier.urihttp://hdl.handle.net/10481/28394
dc.description.abstractWe present a study of the extinction, traced by the Balmer decrement, in HII regions in the dwarf galaxies NGC 1569 and NGC 4214. We find that the large-scale extinction around the most prominent HII regions in both galaxies forms a shell in which locally the intrinsic extinction can adopt relatively high values ($A_V = 0.8 - 0.9$ mag) despite the low metallicity and thus the low overall dust content. The small-scale extinction (spatial resolution $\sim$0.3'') shows fluctuations that are most likely due to variations in the dust distribution. We compare the distribution of the extinction to that of the dust emission, traced by Spitzer emission at 8 and 24 \mi, and to the emission of cold dust at 850 \mi. We find in general a good agreement between all tracers, expect for the 850 \mi emission in NGC 4214 which is more extended than the extinction and the other emissions. Whereas in NGC 1569 the dust emission at all wavelengths is very similar, NGC 4214 shows spatial variations in the 24-to-850 \mi ratio. We furthermore compared the 24 \mi and the extinction-corrected Halpha emission from HII regions in a sample of galaxies with a wide range of metallicities and found a good correlation between both emissions, independent of metallicity. We suggest that this lack of dependence on metallicity might be due to the formation of dust shells with a relatively constant opacity, like the ones observed here, around ionizing stars.es_ES
dc.language.isoenges_ES
dc.publisherCambridge University Press; International Astronomical Union (IAU)es_ES
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivs 3.0 Licensees_ES
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es_ES
dc.subjectISMes_ES
dc.subjectDustes_ES
dc.subjectGalaxies es_ES
dc.subjectISMes_ES
dc.subjectNGC 1569es_ES
dc.subjectNGC 4214es_ES
dc.subjectDwarfes_ES
dc.titleDust properties and distribution in dwarf galaxieses_ES
dc.typeinfo:eu-repo/semantics/preprintes_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES
dc.identifier.doi10.1017/S1743921308024915es_ES


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