The Identification of Galactic Plane Radio Sources: Distant Planetary Nebulae at |b|&lt;2 Degrees

Kistiakowsky, V.; Helfand, D. J.

doi:10.1086/117683

Cited by 18 publications

(15 citation statements)

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“…The IRAC images suggests a spherical structure with a diameter of 10 00 . The near-IR image ( Kistiakowsky & Helfand 1995) shows that the [S iii] lines originate in more compact regions than the dust emission. The SED (Fig.…”

Section: Individual Objectsmentioning

confidence: 99%

“…According to the NVSS survey, the nebula has a flux density of 96:2 AE 3:9 mJy at 1.4 GHz (Condon & Kaplan 1998). The object was identified as a potential PN by Kistiakowsky & Helfand (1995) from near-IR observations and classified as a ''likely PN'' by Parker et al (2006). The IRAC images suggests a spherical structure with a diameter of 10 00 .…”

Section: Individual Objectsmentioning

confidence: 99%

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Planetary Nebulae Detected in theSpitzer Space TelescopeGLIMPSE Legacy Survey

Kwok

Zhang

Koning

et al. 2008

ASTROPHYS J SUPPL S

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We detected and imaged 30 planetary nebulae in the Sptizer Space Telescope Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSE) survey. The distribution of warm dust is clearly shown in these images. From the derived fluxes at the 3.6, 4.5, 5.8, and 8.0 m bands we are able to separate the photospheric, nebular, and dust emission components in the nebulae. Subject headingg s: planetary nebulae: general -stars: AGB and post-AGB

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Section: Individual Objectsmentioning

confidence: 99%

Section: Individual Objectsmentioning

confidence: 99%

Planetary Nebulae Detected in theSpitzer Space TelescopeGLIMPSE Legacy Survey

Kwok

Zhang

Koning

et al. 2008

ASTROPHYS J SUPPL S

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“…direct inspection of the Palomar Observatory and ESO/SERC sky survey plates (Weinberger 1977;Weinberger et al 1983;Kerber et al 1996); 2. radio and/or optical identification of IRAS point sources presenting characteristic infrared colors (Pottasch et al 1988;Van de Steene & Pottasch 1993;Kistiakowsky & Helfand 1995); 3. comparison of deep Hα-on and Hα-off imaging (Beaulieu et al 1999); 4. objective-prism spectra (Kohoutek 1994); 5. red-infrared comparison (Sabbadin 1986;Cappellaro et al 1994). …”

Section: Search For New Pnementioning

confidence: 99%

New planetary nebulae towards the galactic center

Sabbadin

Benetti

Turatto

2001

A&A

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Abstract. Sixteen planetary nebulae and a shocked peculiar nebula were discovered in the direction of the Galactic Center by means of direct inspection of the Palomar Observatory and ESO/SERC sky surveys. For all objects we obtained narrow band Hα imaging and medium resolution spectroscopy, allowing us to derive the basic parameters of the emission nebulae. For half of the nebulae of the sample, the central star candidate was identified and an estimate of the star temperature and luminosity is given.

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“…The requirement of detectable radio emission greatly increases the reliability of the remaining PN candidates but does not completely eliminate contamination by Galactic H II regions and by Seyfert galaxies. Ultimately, optical or near-infrared spectroscopy is needed to conÐrm candidate PNe, and radio images are often needed to provide positions good enough for making reliable optical identiÐcations with faint objects (see Kistiakowsky & Helfand 1995).…”

Section: Introductionmentioning

confidence: 99%

Infrared Planetary Nebulae in the NRAO VLA Sky Survey

Condon

Kaplan

Terzian

1999

ASTROPHYS J SUPPL S

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In order to construct a sample of planetary nebulae (PNe) unbiased by dust extinction, we Ðrst selected the 1358 sources in the IRAS Point Source Catalog north of J2000 declination d \ [40¡ having measured S(25 km) º 1 Jy and colors characteristic of PNe : detections or upper limits consistent with both S(12 km) ¹ 0.35S(25 km) and S(25 km) º 0.35S(60 km). The majority are radio-quiet contaminating sources such as asymptotic giant branch stars. Free-free emission from genuine PNe should make them radio sources. The 1.4 GHz NRAO VLA Sky Survey (NVSS) images and source catalog were used to reject radio-quiet mid-infrared sources. We identiÐed 454 IRAS sources with radio sources brighter than S B 2.5 mJy beam~1 (equivalent to T B 0.8 K in the 45A FHWM NVSS beam) by positional coincidence. They comprise 332 known PNe in the Strasbourg-ESO Catalogue of Galactic Planetary Nebulae and 122 candidate PNe, most of which lie at very low Galactic latitudes. Exploratory optical spectroscopic observations suggest that most of these candidates are indeed PNe optically dimmed by dust extinction, although some contamination remains from H II regions, Seyfert galaxies, etc. Furthermore, the NVSS failed to detect only 4% of the known PNe in our infrared sample. Thus it appears that radio selection can greatly improve the reliability of PN candidate samples without sacriÐcing completeness.

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The Identification of Galactic Plane Radio Sources: Distant Planetary Nebulae at |b|<2 Degrees

Cited by 18 publications

References 0 publications

Planetary Nebulae Detected in theSpitzer Space TelescopeGLIMPSE Legacy Survey

Planetary Nebulae Detected in theSpitzer Space TelescopeGLIMPSE Legacy Survey

New planetary nebulae towards the galactic center

Infrared Planetary Nebulae in the NRAO VLA Sky Survey

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