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Article: Unusual 3 micron emission features in three proto-planetary nebulae

TitleUnusual 3 micron emission features in three proto-planetary nebulae
Authors
KeywordsCircumstellar Matter
Infrared : General
Planetary Nebulae: General
Stars: Evolution
Issue Date1992
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 1992, v. 387 n. 2 PART 2, p. L89-L91 How to Cite?
AbstractMedium-resolution 3-4 μm spectra have been obtained of three objects, IRAS 04296 + 3429, IRAS 22272 + 5435, and CRL 2688, which are in transition between the asymptotic red giant branch and the planetary nebula phase. All three show unusual 3 μm emission features. The two IRAS objects, already unusual in having 21 μm features, have remarkably strong 3.4-3.5 μm emission relative to the usually dominant 3.3 μm feature, with the spectrum of IRAS 04296 + 3429 being nearly identical to that of IRAS 05341+0852 (previously published). CRL 2688's spectrum bears some resemblance to those of the IRAS objects, but its 3.4-3.5 μm emission is not as strong. The relationships between the various emission features are discussed. CRL 2688 may be completing a transition between the "21 μm phase" and the "normal phase," which is associated with dominant 3.3 μm emission, weak 3.4-3.6 μm features and plateau, and a lack of 21 μm emission.
Persistent Identifierhttp://hdl.handle.net/10722/179640
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369

 

DC FieldValueLanguage
dc.contributor.authorGeballe, TRen_US
dc.contributor.authorTielens, AGGMen_US
dc.contributor.authorKwok, Sen_US
dc.contributor.authorHrivnak, BJen_US
dc.date.accessioned2012-12-19T10:02:12Z-
dc.date.available2012-12-19T10:02:12Z-
dc.date.issued1992en_US
dc.identifier.citationAstrophysical Journal Letters, 1992, v. 387 n. 2 PART 2, p. L89-L91en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/10722/179640-
dc.description.abstractMedium-resolution 3-4 μm spectra have been obtained of three objects, IRAS 04296 + 3429, IRAS 22272 + 5435, and CRL 2688, which are in transition between the asymptotic red giant branch and the planetary nebula phase. All three show unusual 3 μm emission features. The two IRAS objects, already unusual in having 21 μm features, have remarkably strong 3.4-3.5 μm emission relative to the usually dominant 3.3 μm feature, with the spectrum of IRAS 04296 + 3429 being nearly identical to that of IRAS 05341+0852 (previously published). CRL 2688's spectrum bears some resemblance to those of the IRAS objects, but its 3.4-3.5 μm emission is not as strong. The relationships between the various emission features are discussed. CRL 2688 may be completing a transition between the "21 μm phase" and the "normal phase," which is associated with dominant 3.3 μm emission, weak 3.4-3.6 μm features and plateau, and a lack of 21 μm emission.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205en_US
dc.relation.ispartofAstrophysical Journal Lettersen_US
dc.subjectCircumstellar Matteren_US
dc.subjectInfrared : Generalen_US
dc.subjectPlanetary Nebulae: Generalen_US
dc.subjectStars: Evolutionen_US
dc.titleUnusual 3 micron emission features in three proto-planetary nebulaeen_US
dc.typeArticleen_US
dc.identifier.emailKwok, S: deannote@hku.hken_US
dc.identifier.authorityKwok, S=rp00716en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0003002729en_US
dc.identifier.volume387en_US
dc.identifier.issue2 PART 2en_US
dc.identifier.spageL89en_US
dc.identifier.epageL91en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridGeballe, TR=7103289480en_US
dc.identifier.scopusauthoridTielens, AGGM=7102963219en_US
dc.identifier.scopusauthoridKwok, S=22980498300en_US
dc.identifier.scopusauthoridHrivnak, BJ=35613962100en_US

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