000002723 001__ 2723
000002723 005__ 20160706140856.0
000002723 037__ $$aASTROimport-880
000002723 100__ $$aSloan, G. C.
000002723 245__ $$aDust and metallicity in carbon stars
000002723 260__ $$c2015
000002723 520__ $$aThe Infrared Spectrograph on the Spitzer Space Telescope observed over 200 carbon stars in nearby metal-poor dwarf galaxies. These spectra probe how the quantity and composition of dust produced by carbon stars depend on initial metallicity, initial mass, and pulsational properties. For stars to produce significant quantities of dust, they must be pulsating in the fundamental mode with strong amplitudes. The spectra confirm that carbon stars with longer pulsation periods produce more dust and that the amount of dust shows no strong dependence on metallicity. This sample includes more carbon stars with low mass and reveals that for a given pulsation period, higher-mass stars produce less dust. Evidence is building for the layering of dust grains, with SiC cores in grains produced by metal-rich carbon stars, and mantles of MgS around grains in all embedded stars.
000002723 700__ $$aGroenewegen, M.
000002723 700__ $$aSrinivasan, S.
000002723 700__ $$aLagadec, E.
000002723 700__ $$aKraemer, K. E.
000002723 700__ $$aMcDonald, I.
000002723 700__ $$aBoyer, M. L.
000002723 700__ $$aZijlstra, A.
000002723 700__ $$aKemper, C.
000002723 773__ $$c216.04$$pAmerican Astronomical Society Meeting Abstracts$$v225$$y2015
000002723 85642 $$ahttp://esoads.eso.org/abs/2015AAS...22521604S
000002723 905__ $$apublished in
000002723 980__ $$aNONREF