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- Publisher Website: 10.1093/pasj/psaa032
- Scopus: eid_2-s2.0-85089683500
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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
| Title | The spectra of evolved stars at 20–25 GHz: Tracing circumstellar chemistry during the asymptotic giant branch to planetary nebula transition |
|---|---|
| Authors | |
| Keywords | radio lines: stars stars: AGB and post-AGB (stars:) circumstellar matter ISM: molecules (ISM:) planetary nebulae: general |
| Issue Date | 2020 |
| Publisher | Oxford 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? |
| Abstract | We 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 Identifier | http://hdl.handle.net/10722/285501 |
| ISSN | 2021 Impact Factor: 3.310 2020 SCImago Journal Rankings: 1.990 |
| ISI Accession Number ID |
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Zhang, Y | - |
| dc.contributor.author | CHAU, W | - |
| dc.contributor.author | Nakashima, JI | - |
| dc.contributor.author | Kwok, S | - |
| dc.date.accessioned | 2020-08-18T03:54:01Z | - |
| dc.date.available | 2020-08-18T03:54:01Z | - |
| dc.date.issued | 2020 | - |
| dc.identifier.citation | Publications of the Astronomical Society of Japan, 2020, v. 72 n. 3, p. article no. 46 | - |
| dc.identifier.issn | 0004-6264 | - |
| dc.identifier.uri | http://hdl.handle.net/10722/285501 | - |
| dc.description.abstract | We 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.language | eng | - |
| dc.publisher | Oxford University Press. The Journal's web site is located at https://academic.oup.com/pasj | - |
| dc.relation.ispartof | Publications of the Astronomical Society of Japan | - |
| dc.rights | Pre-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.subject | radio lines: stars | - |
| dc.subject | stars: AGB and post-AGB | - |
| dc.subject | (stars:) circumstellar matter | - |
| dc.subject | ISM: molecules | - |
| dc.subject | (ISM:) planetary nebulae: general | - |
| dc.title | The spectra of evolved stars at 20–25 GHz: Tracing circumstellar chemistry during the asymptotic giant branch to planetary nebula transition | - |
| dc.type | Article | - |
| dc.description.nature | link_to_subscribed_fulltext | - |
| dc.identifier.doi | 10.1093/pasj/psaa032 | - |
| dc.identifier.scopus | eid_2-s2.0-85089683500 | - |
| dc.identifier.hkuros | 312922 | - |
| dc.identifier.volume | 72 | - |
| dc.identifier.issue | 3 | - |
| dc.identifier.spage | article no. 46 | - |
| dc.identifier.epage | article no. 46 | - |
| dc.identifier.isi | WOS:000544206500011 | - |
| dc.publisher.place | United Kingdom | - |
| dc.identifier.issnl | 0004-6264 | - |