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Article: Unusual 3 micron emission features in three proto-planetary nebulae
Title | Unusual 3 micron emission features in three proto-planetary nebulae |
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Authors | |
Keywords | Circumstellar Matter Infrared : General Planetary Nebulae: General Stars: Evolution |
Issue Date | 1992 |
Publisher | Institute 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? |
Abstract | Medium-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 Identifier | http://hdl.handle.net/10722/179640 |
ISSN | 2023 Impact Factor: 8.8 2023 SCImago Journal Rankings: 2.766 |
DC Field | Value | Language |
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dc.contributor.author | Geballe, TR | en_US |
dc.contributor.author | Tielens, AGGM | en_US |
dc.contributor.author | Kwok, S | en_US |
dc.contributor.author | Hrivnak, BJ | en_US |
dc.date.accessioned | 2012-12-19T10:02:12Z | - |
dc.date.available | 2012-12-19T10:02:12Z | - |
dc.date.issued | 1992 | en_US |
dc.identifier.citation | Astrophysical Journal Letters, 1992, v. 387 n. 2 PART 2, p. L89-L91 | en_US |
dc.identifier.issn | 2041-8205 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/179640 | - |
dc.description.abstract | Medium-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.language | eng | en_US |
dc.publisher | Institute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205 | en_US |
dc.relation.ispartof | Astrophysical Journal Letters | en_US |
dc.subject | Circumstellar Matter | en_US |
dc.subject | Infrared : General | en_US |
dc.subject | Planetary Nebulae: General | en_US |
dc.subject | Stars: Evolution | en_US |
dc.title | Unusual 3 micron emission features in three proto-planetary nebulae | en_US |
dc.type | Article | en_US |
dc.identifier.email | Kwok, S: deannote@hku.hk | en_US |
dc.identifier.authority | Kwok, S=rp00716 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.scopus | eid_2-s2.0-0003002729 | en_US |
dc.identifier.volume | 387 | en_US |
dc.identifier.issue | 2 PART 2 | en_US |
dc.identifier.spage | L89 | en_US |
dc.identifier.epage | L91 | en_US |
dc.publisher.place | United Kingdom | en_US |
dc.identifier.scopusauthorid | Geballe, TR=7103289480 | en_US |
dc.identifier.scopusauthorid | Tielens, AGGM=7102963219 | en_US |
dc.identifier.scopusauthorid | Kwok, S=22980498300 | en_US |
dc.identifier.scopusauthorid | Hrivnak, BJ=35613962100 | en_US |
dc.identifier.issnl | 2041-8205 | - |