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Article: Discovery of two new, carbon-rich proto-planetary nebulae: IRAS Z02229+6208 and IRAS 07430+1115

TitleDiscovery of two new, carbon-rich proto-planetary nebulae: IRAS Z02229+6208 and IRAS 07430+1115
Authors
KeywordsCircumstellar Matter
Infrared: Stars
Stars: Post-Asymptotic Giant Branch
Supergiants
Issue Date1999
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/0004-637X
Citation
The Astrophysical Journal, 1999, v. 513 n. 2 pt. 1, p. 869-878 How to Cite?
AbstractWe report the discovery of two new carbon-rich proto-planetary nebulae (PPNs), IRAS Z02229 + 6208 and 07430+1115. Optical spectroscopy of these sources and another previously discovered PPN, IRAS 05431+0852, reveals the presence of C2 and C3 in absorption. All three objects have the spectra of G-K supergiants, consistent with the expectations of their being PPNs. New ground-based optical and infrared photometry, combined with the IRAS measurements, show double-peak spectral energy distributions for each; this suggests that the asymptotic giant branch (AGB) mass loss has ended and these objects are in the post-AGB phase of evolution. The remnant of the molecular envelope is detected in CO emission for the first time in all three objects, using the CO (3-2) line. The 3.3 and 11.3 μm emission features commonly attributed to the polycyclic aromatic hydrocarbon molecules have been detected in IRAS 07430+1115. Strikingly absent in IRAS 07430+1115, however, is the 21 μm emission feature, found in the other two and in all but one of the other PPNs known to show C2 in absorption.
Persistent Identifierhttp://hdl.handle.net/10722/179650
ISSN
2015 Impact Factor: 5.909
2015 SCImago Journal Rankings: 3.266
References

 

DC FieldValueLanguage
dc.contributor.authorHrivnak, BJen_US
dc.contributor.authorKwok, Sen_US
dc.date.accessioned2012-12-19T10:02:15Z-
dc.date.available2012-12-19T10:02:15Z-
dc.date.issued1999en_US
dc.identifier.citationThe Astrophysical Journal, 1999, v. 513 n. 2 pt. 1, p. 869-878en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/179650-
dc.description.abstractWe report the discovery of two new carbon-rich proto-planetary nebulae (PPNs), IRAS Z02229 + 6208 and 07430+1115. Optical spectroscopy of these sources and another previously discovered PPN, IRAS 05431+0852, reveals the presence of C2 and C3 in absorption. All three objects have the spectra of G-K supergiants, consistent with the expectations of their being PPNs. New ground-based optical and infrared photometry, combined with the IRAS measurements, show double-peak spectral energy distributions for each; this suggests that the asymptotic giant branch (AGB) mass loss has ended and these objects are in the post-AGB phase of evolution. The remnant of the molecular envelope is detected in CO emission for the first time in all three objects, using the CO (3-2) line. The 3.3 and 11.3 μm emission features commonly attributed to the polycyclic aromatic hydrocarbon molecules have been detected in IRAS 07430+1115. Strikingly absent in IRAS 07430+1115, however, is the 21 μm emission feature, found in the other two and in all but one of the other PPNs known to show C2 in absorption.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/0004-637Xen_US
dc.relation.ispartofThe Astrophysical Journalen_US
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectCircumstellar Matteren_US
dc.subjectInfrared: Starsen_US
dc.subjectStars: Post-Asymptotic Giant Branchen_US
dc.subjectSupergiantsen_US
dc.titleDiscovery of two new, carbon-rich proto-planetary nebulae: IRAS Z02229+6208 and IRAS 07430+1115en_US
dc.typeArticleen_US
dc.identifier.emailKwok, S: deannote@hku.hken_US
dc.identifier.authorityKwok, S=rp00716en_US
dc.description.naturepublished_or_final_versionen_US
dc.identifier.doi10.1086/306873-
dc.identifier.scopuseid_2-s2.0-0033540866en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0033540866&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume513en_US
dc.identifier.issue2 pt. 1en_US
dc.identifier.spage869en_US
dc.identifier.epage878en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridHrivnak, BJ=35613962100en_US
dc.identifier.scopusauthoridKwok, S=22980498300en_US

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