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dc.contributor.authorJiang, B. W.
dc.contributor.authorZhang, Ke
dc.contributor.authorLi, Aigen
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.en
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.en
dc.identifier.citationarXiv:0812.2015v2en
dc.identifier.urihttp://hdl.handle.net/10355/5164
dc.relation.isformatofPhysics and Astronomy publicationsen
dc.relation.ispartofPhysics and Astronomy publications (MU)en
dc.relation.ispartofcommunityUniversity of Missouri-Columbia. College of Arts and Sciences. Department of Physics and Astronomy
dc.source.urihttp://arxiv.org/PS_cache/arxiv/pdf/0812/0812.2015v2.pdfen
dc.subjectAGB starsen
dc.subjectpost-AGB starsen
dc.subjectcircumstellar dusten
dc.subjectinfrareden
dc.subject.lcshCircumstellar matteren
dc.subject.lcshStars -- Evolutionen
dc.titleThe 21 micron and 30 micron circumstellar dust features in evolved C-rich objectsen
dc.typeArticleen


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