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Article: Neutral carbon in post-asymptotic giant branch stars and planetary nebulae
Title | Neutral carbon in post-asymptotic giant branch stars and planetary nebulae |
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Authors | |
Keywords | Circumstellar Matter Planetary Nebulae: Individual (Ngc 6302, Iras 21282+5050) Stars: Agb And Post-Agb |
Issue Date | 2003 |
Publisher | Institute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/0004-637X |
Citation | The Astrophysical Journal, 2003, v. 585 n. 1 pt. 1, p. 475-481 How to Cite? |
Abstract | The 492 GHz ( 3P 1 → 3P 0) fine-structure line of neutral atomic carbon (C I) has been observed in the planetary nebulae (PNe) NGC 6302, IRAS 21282+5050, and NGC 7027, and in the protoplanetary nebula (PPN) AFGL 2688. The estimated C I/CO abundance ratio is higher for a more evolved object, consistent with a trend that the C I/CO ratio increases with the evolution of a post-asymptotic giant branch system from a PPN to a PN. Nondetections are also reported on 11 PPNe and extreme carbon stars. The upper limits placed on these objects suggest that they have C I abundances lower than the level found in the PPN AFGL 2688, again consistent with an increasing C I/CO ratio with evolution. |
Persistent Identifier | http://hdl.handle.net/10722/179670 |
ISSN | 2023 Impact Factor: 4.8 2023 SCImago Journal Rankings: 1.905 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
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dc.contributor.author | Hasegawa, TI | en_US |
dc.contributor.author | Kwok, S | en_US |
dc.date.accessioned | 2012-12-19T10:02:44Z | - |
dc.date.available | 2012-12-19T10:02:44Z | - |
dc.date.issued | 2003 | en_US |
dc.identifier.citation | The Astrophysical Journal, 2003, v. 585 n. 1 pt. 1, p. 475-481 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/179670 | - |
dc.description.abstract | The 492 GHz ( 3P 1 → 3P 0) fine-structure line of neutral atomic carbon (C I) has been observed in the planetary nebulae (PNe) NGC 6302, IRAS 21282+5050, and NGC 7027, and in the protoplanetary nebula (PPN) AFGL 2688. The estimated C I/CO abundance ratio is higher for a more evolved object, consistent with a trend that the C I/CO ratio increases with the evolution of a post-asymptotic giant branch system from a PPN to a PN. Nondetections are also reported on 11 PPNe and extreme carbon stars. The upper limits placed on these objects suggest that they have C I abundances lower than the level found in the PPN AFGL 2688, again consistent with an increasing C I/CO ratio with evolution. | 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 | Planetary Nebulae: Individual (Ngc 6302, Iras 21282+5050) | en_US |
dc.subject | Stars: Agb And Post-Agb | en_US |
dc.title | Neutral carbon in post-asymptotic giant branch stars and 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 | published_or_final_version | en_US |
dc.identifier.doi | 10.1086/345950 | en_US |
dc.identifier.scopus | eid_2-s2.0-0041881931 | en_US |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-0041881931&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 585 | en_US |
dc.identifier.issue | 1 pt. 1 | en_US |
dc.identifier.spage | 475 | en_US |
dc.identifier.epage | 481 | en_US |
dc.identifier.isi | WOS:000181046500040 | - |
dc.publisher.place | United Kingdom | en_US |
dc.identifier.scopusauthorid | Hasegawa, TI=7404173711 | en_US |
dc.identifier.scopusauthorid | Kwok, S=22980498300 | en_US |
dc.identifier.issnl | 0004-637X | - |