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Article: Two new evolved bipolar planetary nebulae in the solar neighbourhood
Title | Two new evolved bipolar planetary nebulae in the solar neighbourhood |
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Authors | |
Keywords | Stars: AGB and post-AGB Planetary nebulae: general Planetary nebulae: individual: RCW 24 Planetary nebulae: individual: RCW 69 |
Issue Date | 2006 |
Citation | Monthly Notices of the Royal Astronomical Society, 2006, v. 372, n. 3, p. 1081-1092 How to Cite? |
Abstract | We 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 Identifier | http://hdl.handle.net/10722/208857 |
ISSN | 2023 Impact Factor: 4.7 2023 SCImago Journal Rankings: 1.621 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Frew, David J. | - |
dc.contributor.author | Parker, Quentin A. | - |
dc.contributor.author | Russeil, Delphine | - |
dc.date.accessioned | 2015-03-23T02:01:57Z | - |
dc.date.available | 2015-03-23T02:01:57Z | - |
dc.date.issued | 2006 | - |
dc.identifier.citation | Monthly Notices of the Royal Astronomical Society, 2006, v. 372, n. 3, p. 1081-1092 | - |
dc.identifier.issn | 0035-8711 | - |
dc.identifier.uri | http://hdl.handle.net/10722/208857 | - |
dc.description.abstract | We 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.language | eng | - |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | - |
dc.subject | Stars: AGB and post-AGB | - |
dc.subject | Planetary nebulae: general | - |
dc.subject | Planetary nebulae: individual: RCW 24 | - |
dc.subject | Planetary nebulae: individual: RCW 69 | - |
dc.title | Two new evolved bipolar planetary nebulae in the solar neighbourhood | - |
dc.type | Article | - |
dc.description.nature | link_to_OA_fulltext | - |
dc.identifier.doi | 10.1111/j.1365-2966.2006.10898.x | - |
dc.identifier.scopus | eid_2-s2.0-33750145423 | - |
dc.identifier.volume | 372 | - |
dc.identifier.issue | 3 | - |
dc.identifier.spage | 1081 | - |
dc.identifier.epage | 1092 | - |
dc.identifier.eissn | 1365-2966 | - |
dc.identifier.isi | WOS:000241389400009 | - |
dc.identifier.issnl | 0035-8711 | - |