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dc.contributor.authorJiang, B. W.eng
dc.contributor.authorZhang, Keeng
dc.contributor.authorLi, Aigeneng
dc.date.issued2008-12eng
dc.description.abstractThe 21micron and 30micron bands are the strongest dust emission features detected in evolved low- and intermediate-mass C-rich stars (i.e. asymptotic giant branch [AGB] stars, proto-planetary nebulae [PPN], and planetary nebulae [PN]). While the 21micron feature is rare and exists only in the transient PPN phase, the 30micron feature is more common and seen in the entire late stage of stellar evolution, from AGB to PPN and PN phases, as well as in the low- metallicity galaxies: the Large Magellanic Cloud (LMC) and the Small Magellanic Cloud (SMC). The carriers of these features remain unidentified. Eleven of the twelve well- identified 21micron sources also emit in the 30micron band, suggesting that their carriers may be somewhat related.eng
dc.description.sponsorshipBWJ and KZ are supported in part by China's grants 2007CB815406 and NSFC 10473003. BWJ thanks the LOC for financial support. AL is supported in part by NASA/Spitzer Theory Programs and NSF grant AST 07-07866. We thank Drs. B. Hrivnak and Y. Kimura for helpful suggestions.eng
dc.identifier.citationarXiv:0812.2015v2eng
dc.identifier.urihttp://hdl.handle.net/10355/5164eng
dc.relation.isformatofPhysics and Astronomy publicationseng
dc.relation.ispartofPhysics and Astronomy publications (MU)eng
dc.relation.ispartofcommunityUniversity of Missouri-Columbia. College of Arts and Sciences. Department of Physics and Astronomyeng
dc.source.urihttp://arxiv.org/PS_cache/arxiv/pdf/0812/0812.2015v2.pdfeng
dc.subjectAGB starseng
dc.subjectpost-AGB starseng
dc.subjectcircumstellar dusteng
dc.subjectinfraredeng
dc.subject.lcshCircumstellar mattereng
dc.subject.lcshStars -- Evolutioneng
dc.titleThe 21 micron and 30 micron circumstellar dust features in evolved C-rich objectseng
dc.typeArticleeng


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