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Article: A molecular line survey of the extreme carbon star crl3068 at millimeter wavelengths

TitleA molecular line survey of the extreme carbon star crl3068 at millimeter wavelengths
Authors
KeywordsCircumstellar Matter
Ism: Molecules
Line: Identification
Radio Lines: Stars
Stars: Agb And Post-Agb
Stars: Individual (Crl 3068)
Surveys
Issue Date2009
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/0004-637X
Citation
The Astrophysical Journal, 2009, v. 700 n. 2, p. 1262-1281 How to Cite?
AbstractWe present the results of a molecular line survey of the extreme carbon star CRL3068. The observations were carried out with the Arizona Radio Observatory (ARO) 12m telescope and the Heinrich Hertz Submillimeter Telescope (SMT) at the λ 2mm and λ 1.3mm atmospheric windows. The observations cover the frequency bands from 130 to 162GHz and 219.5 to 267.5GHz. The typical sensitivities achieved are T R < 15mK and T R < 7mK for the ARO 12m and SMT, respectively. Seventy-two individual emission features belonging to 23 molecular species and isotopologues were detected. Only three faint lines remain unidentified. The species c-C 3H, CH 3CN, SiC 2, and the isotopologues, C 17O, C 18O, HC 15N, HN 13C, C 33S, C 34S, 13CS, 29SiS, and 30SiS are detected in this object for the first time. Rotational-diagram analysis is carried out to determine the column densities and excitation temperatures. The isotopic ratios of the elements C, N, O, S, and Si have also been estimated. The results are consistent with stellar CNO processing and suggest that CRL3068 is more carbon rich than IRC+10216 and CIT6. It is also shown that the chemical composition in CRL3068 is somewhat different from that in IRC+10216 with a more extensive synthesis of cyclic and long-chain molecules in CRL3068. The results will provide valuable clues for better understanding circumstellar chemistry © 2009 The American Astronomical Society.
Persistent Identifierhttp://hdl.handle.net/10722/179717
ISSN
2015 Impact Factor: 5.909
2015 SCImago Journal Rankings: 3.266
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhang, Yen_US
dc.contributor.authorKwok, Sen_US
dc.contributor.authorNakashima, JIen_US
dc.date.accessioned2012-12-19T10:03:14Z-
dc.date.available2012-12-19T10:03:14Z-
dc.date.issued2009en_US
dc.identifier.citationThe Astrophysical Journal, 2009, v. 700 n. 2, p. 1262-1281en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/179717-
dc.description.abstractWe present the results of a molecular line survey of the extreme carbon star CRL3068. The observations were carried out with the Arizona Radio Observatory (ARO) 12m telescope and the Heinrich Hertz Submillimeter Telescope (SMT) at the λ 2mm and λ 1.3mm atmospheric windows. The observations cover the frequency bands from 130 to 162GHz and 219.5 to 267.5GHz. The typical sensitivities achieved are T R < 15mK and T R < 7mK for the ARO 12m and SMT, respectively. Seventy-two individual emission features belonging to 23 molecular species and isotopologues were detected. Only three faint lines remain unidentified. The species c-C 3H, CH 3CN, SiC 2, and the isotopologues, C 17O, C 18O, HC 15N, HN 13C, C 33S, C 34S, 13CS, 29SiS, and 30SiS are detected in this object for the first time. Rotational-diagram analysis is carried out to determine the column densities and excitation temperatures. The isotopic ratios of the elements C, N, O, S, and Si have also been estimated. The results are consistent with stellar CNO processing and suggest that CRL3068 is more carbon rich than IRC+10216 and CIT6. It is also shown that the chemical composition in CRL3068 is somewhat different from that in IRC+10216 with a more extensive synthesis of cyclic and long-chain molecules in CRL3068. The results will provide valuable clues for better understanding circumstellar chemistry © 2009 The American Astronomical Society.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.subjectIsm: Moleculesen_US
dc.subjectLine: Identificationen_US
dc.subjectRadio Lines: Starsen_US
dc.subjectStars: Agb And Post-Agben_US
dc.subjectStars: Individual (Crl 3068)en_US
dc.subjectSurveysen_US
dc.titleA molecular line survey of the extreme carbon star crl3068 at millimeter wavelengthsen_US
dc.typeArticleen_US
dc.identifier.emailZhang, Y: zhangy96@hku.hken_US
dc.identifier.emailKwok, S: deannote@hku.hken_US
dc.identifier.emailNakashima, JI: junichi@hku.hken_US
dc.identifier.authorityZhang, Y=rp00841en_US
dc.identifier.authorityKwok, S=rp00716en_US
dc.identifier.authorityNakashima, JI=rp00764en_US
dc.description.naturepublished_or_final_versionen_US
dc.identifier.doi10.1088/0004-637X/700/2/1262en_US
dc.identifier.scopuseid_2-s2.0-70449725422en_US
dc.identifier.hkuros155560-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-70449725422&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume700en_US
dc.identifier.issue2en_US
dc.identifier.spage1262en_US
dc.identifier.epage1281en_US
dc.identifier.isiWOS:000268098100035-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridZhang, Y=23768446500en_US
dc.identifier.scopusauthoridKwok, S=22980498300en_US
dc.identifier.scopusauthoridNakashima, JI=35485342300en_US

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