000002794 001__ 2794
000002794 005__ 20160706140611.0
000002794 037__ $$aASTROimport-951
000002794 100__ $$aSloan, G. C.
000002794 245__ $$aCarbon Dust Production in Nearby Dwarf Spheroidal Galaxies
000002794 260__ $$c2012
000002794 520__ $$aInfrared spectra from the Spitzer Space Telescope reveal significant quantities of dust produced in the outflows from carbon stars in the Sculptor, Fornax, and Leo I dwarf spheroidal galaxies. Three carbon stars in the Carina dwarf spheroidal appear to be relatively dust free. Many of the sources are known long-period variables, and comparisons of how the quantity of dust varies with pulsation period show no dependence on metallicity, as previously found when studying carbon stars in the more metal-rich Magellanic Clouds and the Milky Way. The previous comparisons revealed that as metallicity decreases, SiC dust emission features generally grow weaker while acetylene absorption bands grow stronger. Our new data also follow these trends and extend them to metallicities with [Fe/H] as low as about -1.4.
000002794 700__ $$aZijlstra, A. A.
000002794 700__ $$aLagadec, E.
000002794 700__ $$aMatsuura, M.
000002794 700__ $$aKraemer, K. E.
000002794 700__ $$aGroenewegen, M. A. T.
000002794 700__ $$aMcDonald, I.
000002794 700__ $$avan Loon, J. T.
000002794 700__ $$aBernard-Salas, J.
000002794 700__ $$aWood, P. R.
000002794 773__ $$c320.04$$pAmerican Astronomical Society Meeting Abstracts #219$$v219$$y2012
000002794 85642 $$ahttp://esoads.eso.org/abs/2012AAS...21932004S
000002794 905__ $$apublished in
000002794 980__ $$aNONREF