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Article: Two new evolved bipolar planetary nebulae in the solar neighbourhood

TitleTwo new evolved bipolar planetary nebulae in the solar neighbourhood
Authors
KeywordsStars: AGB and post-AGB
Planetary nebulae: general
Planetary nebulae: individual: RCW 24
Planetary nebulae: individual: RCW 69
Issue Date2006
Citation
Monthly Notices of the Royal Astronomical Society, 2006, v. 372, n. 3, p. 1081-1092 How to Cite?
AbstractWe present AAO/UKST Hα+[N II] narrow-band imagery and low- and medium-resolution optical spectroscopy of RCW 24 and RCW 69. These nebulae were previously classified as H II regions, but we now show them to be two of the largest and nearest bipolar Type I PNe yet discovered. Distances were estimated using extinction - distance and kinematic methods, and via a new Ha surface brightness - radius relation. The adopted distances are 1.0 ± 0.3 kpc for RCW 24 and 1.3 ± 0.2 kpc for RCW 69. Both objects have enhanced nitrogen abundances, with log N/O ≃ +0.44 for RCW 24, and log N/O = +0.33 for RCW 69. Systemic velocities and |z| distances are VLSR = +5 km s -1 and |z| ∼ 23 pc for RCW 24, and VLSR = -33 km s-1 and only |z| ∼ 7 pc for RCW 69. Both PNe originated from massive progenitors (>2.0-2.5 M⊙), as deduced from their chemical abundances, large ionized masses, small |z| distances, low peculiar velocities and relatively hot central stars. These two objects form an important addition to the small sample of evolved bipolar PNe in the solar neighbourhood. © 2006 RAS.
Persistent Identifierhttp://hdl.handle.net/10722/208857
ISSN
2015 Impact Factor: 4.952
2015 SCImago Journal Rankings: 2.806

 

DC FieldValueLanguage
dc.contributor.authorFrew, David J.-
dc.contributor.authorParker, Quentin A.-
dc.contributor.authorRusseil, Delphine-
dc.date.accessioned2015-03-23T02:01:57Z-
dc.date.available2015-03-23T02:01:57Z-
dc.date.issued2006-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2006, v. 372, n. 3, p. 1081-1092-
dc.identifier.issn0035-8711-
dc.identifier.urihttp://hdl.handle.net/10722/208857-
dc.description.abstractWe present AAO/UKST Hα+[N II] narrow-band imagery and low- and medium-resolution optical spectroscopy of RCW 24 and RCW 69. These nebulae were previously classified as H II regions, but we now show them to be two of the largest and nearest bipolar Type I PNe yet discovered. Distances were estimated using extinction - distance and kinematic methods, and via a new Ha surface brightness - radius relation. The adopted distances are 1.0 ± 0.3 kpc for RCW 24 and 1.3 ± 0.2 kpc for RCW 69. Both objects have enhanced nitrogen abundances, with log N/O ≃ +0.44 for RCW 24, and log N/O = +0.33 for RCW 69. Systemic velocities and |z| distances are VLSR = +5 km s -1 and |z| ∼ 23 pc for RCW 24, and VLSR = -33 km s-1 and only |z| ∼ 7 pc for RCW 69. Both PNe originated from massive progenitors (>2.0-2.5 M⊙), as deduced from their chemical abundances, large ionized masses, small |z| distances, low peculiar velocities and relatively hot central stars. These two objects form an important addition to the small sample of evolved bipolar PNe in the solar neighbourhood. © 2006 RAS.-
dc.languageeng-
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society-
dc.subjectStars: AGB and post-AGB-
dc.subjectPlanetary nebulae: general-
dc.subjectPlanetary nebulae: individual: RCW 24-
dc.subjectPlanetary nebulae: individual: RCW 69-
dc.titleTwo new evolved bipolar planetary nebulae in the solar neighbourhood-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1111/j.1365-2966.2006.10898.x-
dc.identifier.scopuseid_2-s2.0-33750145423-
dc.identifier.volume372-
dc.identifier.issue3-
dc.identifier.spage1081-
dc.identifier.epage1092-
dc.identifier.eissn1365-2966-

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