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Article: Neutral carbon in post-asymptotic giant branch stars and planetary nebulae

TitleNeutral carbon in post-asymptotic giant branch stars and planetary nebulae
Authors
Hasegawa, TIKwok, S
KeywordsCircumstellar Matter
Planetary Nebulae: Individual (Ngc 6302, Iras 21282+5050)
Stars: Agb And Post-Agb
Issue Date2003
PublisherInstitute 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?
DOI: http://dx.doi.org/10.1086/345950
AbstractThe 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 Identifierhttp://hdl.handle.net/10722/179670
ISSN
0004-637X
2021 Impact Factor: 5.521
2020 SCImago Journal Rankings: 2.376
ISI Accession Number ID
WOS:000181046500040
References
References in Scopus

 

DC FieldValueLanguage
dc.contributor.authorHasegawa, TIen_US
dc.contributor.authorKwok, Sen_US
dc.date.accessioned2012-12-19T10:02:44Z-
dc.date.available2012-12-19T10:02:44Z-
dc.date.issued2003en_US
dc.identifier.citationThe Astrophysical Journal, 2003, v. 585 n. 1 pt. 1, p. 475-481en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/179670-
dc.description.abstractThe 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.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.subjectCircumstellar Matteren_US
dc.subjectPlanetary Nebulae: Individual (Ngc 6302, Iras 21282+5050)en_US
dc.subjectStars: Agb And Post-Agben_US
dc.titleNeutral carbon in post-asymptotic giant branch stars and planetary nebulaeen_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.doi10.1086/345950en_US
dc.identifier.scopuseid_2-s2.0-0041881931en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0041881931&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume585en_US
dc.identifier.issue1 pt. 1en_US
dc.identifier.spage475en_US
dc.identifier.epage481en_US
dc.identifier.isiWOS:000181046500040-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridHasegawa, TI=7404173711en_US
dc.identifier.scopusauthoridKwok, S=22980498300en_US
dc.identifier.issnl0004-637X-

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