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Article: Discovery of two new, carbon-rich proto-planetary nebulae: IRAS Z02229+6208 and IRAS 07430+1115
Title | Discovery of two new, carbon-rich proto-planetary nebulae: IRAS Z02229+6208 and IRAS 07430+1115 |
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Authors | |
Keywords | Circumstellar Matter Infrared: Stars Stars: Post-Asymptotic Giant Branch Supergiants |
Issue Date | 1999 |
Publisher | Institute 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? |
Abstract | We 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 Identifier | http://hdl.handle.net/10722/179650 |
ISSN | 2023 Impact Factor: 4.8 2023 SCImago Journal Rankings: 1.905 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Hrivnak, BJ | en_US |
dc.contributor.author | Kwok, S | en_US |
dc.date.accessioned | 2012-12-19T10:02:15Z | - |
dc.date.available | 2012-12-19T10:02:15Z | - |
dc.date.issued | 1999 | en_US |
dc.identifier.citation | The Astrophysical Journal, 1999, v. 513 n. 2 pt. 1, p. 869-878 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/179650 | - |
dc.description.abstract | We 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.language | eng | en_US |
dc.publisher | Institute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/0004-637X | en_US |
dc.relation.ispartof | The Astrophysical Journal | en_US |
dc.subject | Circumstellar Matter | en_US |
dc.subject | Infrared: Stars | en_US |
dc.subject | Stars: Post-Asymptotic Giant Branch | en_US |
dc.subject | Supergiants | en_US |
dc.title | Discovery of two new, carbon-rich proto-planetary nebulae: IRAS Z02229+6208 and IRAS 07430+1115 | 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 | published_or_final_version | en_US |
dc.identifier.doi | 10.1086/306873 | - |
dc.identifier.scopus | eid_2-s2.0-0033540866 | en_US |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-0033540866&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 513 | en_US |
dc.identifier.issue | 2 pt. 1 | en_US |
dc.identifier.spage | 869 | en_US |
dc.identifier.epage | 878 | en_US |
dc.identifier.isi | WOS:000079816000031 | - |
dc.publisher.place | United Kingdom | en_US |
dc.identifier.scopusauthorid | Hrivnak, BJ=35613962100 | en_US |
dc.identifier.scopusauthorid | Kwok, S=22980498300 | en_US |
dc.identifier.issnl | 0004-637X | - |