The 21 micron and 30 micron circumstellar dust features in evolved C-rich objects

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The 21 micron and 30 micron circumstellar dust features in evolved C-rich objects

Please use this identifier to cite or link to this item: http://hdl.handle.net/10355/5164

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dc.contributor.author Jiang, B. W.
dc.contributor.author Zhang, Ke
dc.contributor.author Li, Aigen
dc.date.accessioned 2010-01-28T16:34:55Z
dc.date.available 2010-01-28T16:34:55Z
dc.date.issued 2008-12-10
dc.identifier.citation arXiv:0812.2015v2 en
dc.identifier.uri http://hdl.handle.net/10355/5164
dc.description.abstract The 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.sponsorship BWJ 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.language.iso en_US en
dc.relation.isformatof Physics and Astronomy publications en
dc.relation.ispartof Physics and Astronomy publications (MU) en
dc.source.uri http://arxiv.org/PS_cache/arxiv/pdf/0812/0812.2015v2.pdf en
dc.subject AGB stars en
dc.subject post-AGB stars en
dc.subject circumstellar dust en
dc.subject infrared en
dc.subject.lcsh Circumstellar matter en
dc.subject.lcsh Stars -- Evolution en
dc.title The 21 micron and 30 micron circumstellar dust features in evolved C-rich objects en
dc.type Article en
dc.relation.ispartofcommunity University of Missouri-Columbia. College of Arts and Sciences. Department of Physics and Astronomy


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