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Article: The discovery of circumstellar arcs around two bipolar proto-planetary nebulae

TitleThe discovery of circumstellar arcs around two bipolar proto-planetary nebulae
Authors
KeywordsCircumstellar Matter
Planetary Nebulae: General
Stars: Agb And Post-Agb
Issue Date2001
PublisherUniversity of Chicago Press. The Journal's web site is located at http://www.journals.uchicago.edu/AJ/home.html
Citation
Astronomical Journal, 2001, v. 121 n. 5, p. 2775-2780 How to Cite?
AbstractCircumstellar arcs have been discovered using the Hubble Space Telescope in two proto-planetary nebulae (PPNs), IRAS 16594-4656, and IRAS 20028 + 3910. This raises to five the number of PPNs in which such arcs have been detected and suggests that they are not rare and may even be common features. All five of these PPNs display a bipolar morphology, but this correlation may be the result of a selection effect in which deeper images are taken of bipolar PPNs in which the central star is obscured. Two pairs of oppositely directed "searchlight beams" are seen in IRAS 20028 + 3910, similar to those seen in AFGL 2688 and IRAS 17150-3224. The presence of circular arcs and rings in PPNs and planetary nebulae with a variety of viewing orientations implies that they are illuminated portions of spherical shells viewed in scattered light. This suggests that the mass-loss process is spherically symmetric over most of the lifetime of the progenitor asymptotic giant branch (AGB) star, and the transition to a bipolar morphology occurs over a short period at the end of the AGB evolution.
Persistent Identifierhttp://hdl.handle.net/10722/179638
ISSN
2015 Impact Factor: 4.617
2015 SCImago Journal Rankings: 3.069
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHrivnak, BJen_US
dc.contributor.authorKwok, Sen_US
dc.contributor.authorSu, KYLen_US
dc.date.accessioned2012-12-19T10:02:12Z-
dc.date.available2012-12-19T10:02:12Z-
dc.date.issued2001en_US
dc.identifier.citationAstronomical Journal, 2001, v. 121 n. 5, p. 2775-2780en_US
dc.identifier.issn0004-6256en_US
dc.identifier.urihttp://hdl.handle.net/10722/179638-
dc.description.abstractCircumstellar arcs have been discovered using the Hubble Space Telescope in two proto-planetary nebulae (PPNs), IRAS 16594-4656, and IRAS 20028 + 3910. This raises to five the number of PPNs in which such arcs have been detected and suggests that they are not rare and may even be common features. All five of these PPNs display a bipolar morphology, but this correlation may be the result of a selection effect in which deeper images are taken of bipolar PPNs in which the central star is obscured. Two pairs of oppositely directed "searchlight beams" are seen in IRAS 20028 + 3910, similar to those seen in AFGL 2688 and IRAS 17150-3224. The presence of circular arcs and rings in PPNs and planetary nebulae with a variety of viewing orientations implies that they are illuminated portions of spherical shells viewed in scattered light. This suggests that the mass-loss process is spherically symmetric over most of the lifetime of the progenitor asymptotic giant branch (AGB) star, and the transition to a bipolar morphology occurs over a short period at the end of the AGB evolution.en_US
dc.languageengen_US
dc.publisherUniversity of Chicago Press. The Journal's web site is located at http://www.journals.uchicago.edu/AJ/home.htmlen_US
dc.relation.ispartofAstronomical Journalen_US
dc.subjectCircumstellar Matteren_US
dc.subjectPlanetary Nebulae: Generalen_US
dc.subjectStars: Agb And Post-Agben_US
dc.titleThe discovery of circumstellar arcs around two bipolar proto-planetary nebulaeen_US
dc.typeArticleen_US
dc.identifier.emailKwok, S: deannote@hku.hken_US
dc.identifier.authorityKwok, S=rp00716en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1086/320400en_US
dc.identifier.scopuseid_2-s2.0-0001492453en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0001492453&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume121en_US
dc.identifier.issue5en_US
dc.identifier.spage2775en_US
dc.identifier.epage2780en_US
dc.identifier.isiWOS:000168592800039-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridHrivnak, BJ=35613962100en_US
dc.identifier.scopusauthoridKwok, S=22980498300en_US
dc.identifier.scopusauthoridSu, KYL=26326482200en_US

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