Two new evolved bipolar planetary nebulae in the solar neighbourhood
Identifieur interne : 002F94 ( Istex/Corpus ); précédent : 002F93; suivant : 002F95Two new evolved bipolar planetary nebulae in the solar neighbourhood
Auteurs : David J. Frew ; Quentin A. Parker ; Delphine RusseilSource :
- Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 2006-11-01.
English descriptors
- KwdEn :
- Absolute magnitude, Accurate determination, Arbitrary units, Arcmin, Arcmin centred, Arcsec, Astronomical tools, Available data, Available spectra, Balmer decrement, Better determination, Bipolar, Bipolar morphologies, Bipolar nebulae, Bipolar type, Central star, Central stars, Centre, Centred, Chemical abundances, Coalsack nebula, Corradi, Corradi schwarz, Cspn, Deeper spectra, Diagnostic diagram, Different spectra, Diffuse emission, Dispersion direction, Dopita, Dopita meatheringham, Dust lanes, Electron temperature, Elemental abundances, Emission lines, Excellent agreement, Excitation, Excitation class, Extinction, Flair spectra, Frew, Frew parker, Galactic, Grating, Helium zanstra temperature, Huggins, Important addition, Individual distances, Iraf emsao package, Journal compilation, Kaler, Kaler jacoby, Kinematic, Kinematic distance, Large uncertainty, Line intensities, Lling factor, Lobe, Logarithmic extinction, Luminosity function, Main body, Massive progenitors, Mnras, Molecular emission, Molecular material, Morphology, Nearby type, Nebula, Nebulae figure, Nebular, Neckel vehrenberg, Nitrogen abundances, Optical spectroscopy, Outer dimensions, Patrick woudt, Peculiar velocities, Peculiar velocity, Peimbert, Peimbert serrano, Planetary nebulae, Progenitor, Progenitor star, Quiescent region, Radial velocities, Reddening, Reddening distance, Reddening value, Russeil, Saao, Saao spectra, Saao spectrum, Shassa, Simbad data base, Slit length, Small sample, Solar neighbourhood, Standard iraf routines, Standard kinematic distance, Supercosmos, Supercosmos data, Supercosmos pixel data, Surface brightness, Surface relation, Survey image, Uxes, Zanstra, Zanstra temperatures.
- Teeft :
- Absolute magnitude, Accurate determination, Arbitrary units, Arcmin, Arcmin centred, Arcsec, Astronomical tools, Available data, Available spectra, Balmer decrement, Better determination, Bipolar, Bipolar morphologies, Bipolar nebulae, Bipolar type, Central star, Central stars, Centre, Centred, Chemical abundances, Coalsack nebula, Corradi, Corradi schwarz, Cspn, Deeper spectra, Diagnostic diagram, Different spectra, Diffuse emission, Dispersion direction, Dopita, Dopita meatheringham, Dust lanes, Electron temperature, Elemental abundances, Emission lines, Excellent agreement, Excitation, Excitation class, Extinction, Flair spectra, Frew, Frew parker, Galactic, Grating, Helium zanstra temperature, Huggins, Important addition, Individual distances, Iraf emsao package, Journal compilation, Kaler, Kaler jacoby, Kinematic, Kinematic distance, Large uncertainty, Line intensities, Lling factor, Lobe, Logarithmic extinction, Luminosity function, Main body, Massive progenitors, Mnras, Molecular emission, Molecular material, Morphology, Nearby type, Nebula, Nebulae figure, Nebular, Neckel vehrenberg, Nitrogen abundances, Optical spectroscopy, Outer dimensions, Patrick woudt, Peculiar velocities, Peculiar velocity, Peimbert, Peimbert serrano, Planetary nebulae, Progenitor, Progenitor star, Quiescent region, Radial velocities, Reddening, Reddening distance, Reddening value, Russeil, Saao, Saao spectra, Saao spectrum, Shassa, Simbad data base, Slit length, Small sample, Solar neighbourhood, Standard iraf routines, Standard kinematic distance, Supercosmos, Supercosmos data, Supercosmos pixel data, Surface brightness, Surface relation, Survey image, Uxes, Zanstra, Zanstra temperatures.
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 Hα 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.
Url:
DOI: 10.1111/j.1365-2966.2006.10898.x
Links to Exploration step
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<front><div type="abstract" xml:lang="en">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 Hα 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.</div>
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<author><json:item><name>David J. Frew</name>
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<value>planetary nebulae: individual: RCW 69</value>
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<abstract lang="en">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 Hα 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.</abstract>
<subject lang="en"><genre>keywords</genre>
<topic>stars: AGB and post‐AGB</topic>
<topic>planetary nebulae: general</topic>
<topic>planetary nebulae: individual: RCW 24</topic>
<topic>planetary nebulae: individual: RCW 69</topic>
</subject>
<relatedItem type="host"><titleInfo><title>Monthly Notices of the Royal Astronomical Society</title>
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<identifier type="ISSN">0035-8711</identifier>
<identifier type="eISSN">1365-2966</identifier>
<identifier type="DOI">10.1111/(ISSN)1365-2966</identifier>
<identifier type="PublisherID">MNR</identifier>
<part><date>2006</date>
<detail type="volume"><caption>vol.</caption>
<number>372</number>
</detail>
<detail type="issue"><caption>no.</caption>
<number>3</number>
</detail>
<extent unit="pages"><start>1081</start>
<end>1092</end>
<total>12</total>
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</part>
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<identifier type="ark">ark:/67375/WNG-1GZMFZ2L-H</identifier>
<identifier type="DOI">10.1111/j.1365-2966.2006.10898.x</identifier>
<identifier type="ArticleID">MNR10898</identifier>
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