Discovery of Extreme Carbon Stars in the Large Magellanic Cloud

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dc.creatorGruendl, R. A.
dc.creatorChu, Y. -H.
dc.creatorSeale, J. P.
dc.creatorMatsuura, M.
dc.creatorSpeck, A. K.
dc.creatorSloan, G. C.
dc.creatorLooney, L. W.
dc.date2008-09-30
dc.date.accessioned2026-07-07T12:15:45Z
dc.date.available2026-07-07T12:15:45Z
dc.descriptionUsing Spitzer IRAC and MIPS observations of the Large Magellanic Cloud, we have identified 13 objects that have extremely red mid-IR colors. Follow-up Spitzer IRS observations of seven of these sources reveal varying amounts of SiC and C2H2 absorption as well as the presence of a broad MgS feature in at least two cases, indicating that these are extreme carbon stars. Preliminary estimates find these objects have luminosities of 4-11x10^3 Lsol and preliminary model fitting gives mass-loss rates between 4x10^-5 and 2x10^-4 Msol/yr, higher than any known carbon-rich AGB star in the LMC. These spectral and physical properties require careful reconsideration of dust condensation and mass-loss processes for carbon stars in low metallicity environments.
dc.descriptionAccepted for publication in ApJ Letters. 4 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/0809.5107
dc.identifierhttp://arxiv.org/abs/0809.5107
dc.identifierAstrophys.J.688:L9-L12,2008
dc.identifierdoi:10.1086/593979
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/211584
dc.subjectAstrophysics
dc.titleDiscovery of Extreme Carbon Stars in the Large Magellanic Cloud
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