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Carbon-rich dust production in metal-poor galaxies in the local group

Sloan, G C; Matsuura, Mikako; Lagadec, E; van Loon, Jacco Th; Kraemer, K E; McDonald, I; Groenewegen, M. A. T.; Wood, Peter R; Bernard-Salas, J.; Zijlstra, Albert A


We have observed a sample of 19 carbon stars in the Sculptor, Carina, Fornax, and Leo I dwarf spheroidal galaxies with the Infrared Spectrograph on the Spitzer Space Telescope. The spectra show significant quantities of dust around the carbon stars in Sculptor, Fornax, and Leo I, but little in Carina. Previous comparisons of carbon stars with similar pulsation properties in the Galaxy and the Magellanic Clouds revealed no evidence that metallicity affected the production of dust by carbon...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
Source: Astrophysical Journal, The
DOI: 10.1088/0004-637X/752/2/140


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