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Article: The spectra of evolved stars at 20–25 GHz: Tracing circumstellar chemistry during the asymptotic giant branch to planetary nebula transition

TitleThe spectra of evolved stars at 20–25 GHz: Tracing circumstellar chemistry during the asymptotic giant branch to planetary nebula transition
Authors
Keywordsradio lines: stars
stars: AGB and post-AGB
(stars:) circumstellar matter
ISM: molecules
(ISM:) planetary nebulae: general
Issue Date2020
PublisherOxford University Press. The Journal's web site is located at https://academic.oup.com/pasj
Citation
Publications of the Astronomical Society of Japan, 2020, v. 72 n. 3, p. article no. 46 How to Cite?
AbstractWe report an unbiased radio line survey towards the circumstellar envelopes of evolved stars at the frequency range from 20 to 25 GHz, aiming to obtain a more complete unbiased picture of the chemical evolution in the final stages of stellar evolution. The observation sample includes the asymptotic giant branch (AGB) star IRC +10216, the proto-planetary nebulae (PPNs) CRL 2688 and CRL 618, and the young planetary nebula (PN) NGC 7027, representing an evolutionary sequence spanning about 10000 years. Rotational transitions from cyanopolyyne chains and inversion lines from ammonia are detected in the AGB star and PPNs, while the PN displays several recombination lines. The different spectral behaviors of these evolved stars clearly reflect the evolution of circumstellar chemistry during the AGB–PPN–PN transitions.
Persistent Identifierhttp://hdl.handle.net/10722/285501
ISSN
2023 Impact Factor: 2.2
2023 SCImago Journal Rankings: 0.860
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhang, Y-
dc.contributor.authorCHAU, W-
dc.contributor.authorNakashima, JI-
dc.contributor.authorKwok, S-
dc.date.accessioned2020-08-18T03:54:01Z-
dc.date.available2020-08-18T03:54:01Z-
dc.date.issued2020-
dc.identifier.citationPublications of the Astronomical Society of Japan, 2020, v. 72 n. 3, p. article no. 46-
dc.identifier.issn0004-6264-
dc.identifier.urihttp://hdl.handle.net/10722/285501-
dc.description.abstractWe report an unbiased radio line survey towards the circumstellar envelopes of evolved stars at the frequency range from 20 to 25 GHz, aiming to obtain a more complete unbiased picture of the chemical evolution in the final stages of stellar evolution. The observation sample includes the asymptotic giant branch (AGB) star IRC +10216, the proto-planetary nebulae (PPNs) CRL 2688 and CRL 618, and the young planetary nebula (PN) NGC 7027, representing an evolutionary sequence spanning about 10000 years. Rotational transitions from cyanopolyyne chains and inversion lines from ammonia are detected in the AGB star and PPNs, while the PN displays several recombination lines. The different spectral behaviors of these evolved stars clearly reflect the evolution of circumstellar chemistry during the AGB–PPN–PN transitions.-
dc.languageeng-
dc.publisherOxford University Press. The Journal's web site is located at https://academic.oup.com/pasj-
dc.relation.ispartofPublications of the Astronomical Society of Japan-
dc.rightsPre-print: Journal Title] ©: [year] [owner as specified on the article] Published by Oxford University Press [on behalf of xxxxxx]. All rights reserved. Pre-print (Once an article is published, preprint notice should be amended to): This is an electronic version of an article published in [include the complete citation information for the final version of the Article as published in the print edition of the Journal.] Post-print: This is a pre-copy-editing, author-produced PDF of an article accepted for publication in [insert journal title] following peer review. The definitive publisher-authenticated version [insert complete citation information here] is available online at: xxxxxxx [insert URL that the author will receive upon publication here].-
dc.subjectradio lines: stars-
dc.subjectstars: AGB and post-AGB-
dc.subject(stars:) circumstellar matter-
dc.subjectISM: molecules-
dc.subject(ISM:) planetary nebulae: general-
dc.titleThe spectra of evolved stars at 20–25 GHz: Tracing circumstellar chemistry during the asymptotic giant branch to planetary nebula transition-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1093/pasj/psaa032-
dc.identifier.scopuseid_2-s2.0-85089683500-
dc.identifier.hkuros312922-
dc.identifier.volume72-
dc.identifier.issue3-
dc.identifier.spagearticle no. 46-
dc.identifier.epagearticle no. 46-
dc.identifier.isiWOS:000544206500011-
dc.publisher.placeUnited Kingdom-
dc.identifier.issnl0004-6264-

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