- ID:
- ivo://CDS.VizieR/J/AJ/131/2089
- Title:
- Planetary nebulae in NGC 3379 and NGC 3384
- Short Name:
- J/AJ/131/2089
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report on observations of four early-type galaxies performed with the Rutgers Fabry-Perot in order to search for planetary nebulae (PNe) in these systems. The aim is to use the PNe as kinematic tracers of the galaxy potential. We describe our data reduction and analysis procedure and show that the proper calibration of our detection statistic is crucial in getting down to our limiting magnitude of m_5007_=26.1. In the case of the two Leo galaxies, we find moderately sized samples: 54 PNe in NGC 3379 and 50 PNe in NGC 3384; NGC 4636 (two PNe) and NGC 1549 (six PNe) are included for completeness. We present our samples in tabular form, as well as the spectrum for each PN.
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Search Results
- ID:
- ivo://CDS.VizieR/J/ApJS/123/219
- Title:
- Planetary Nebulae in NRAO VLA Sky Survey
- Short Name:
- J/ApJS/123/219
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- In order to construct a sample of planetary nebulae (PNe) unbiased by dust extinction, we first selected the 1358 sources in the IRAS Point Source Catalog north of J2000 declination DE=-40{deg} having measured S(25{mu}m)>=1 Jy and colors characteristic of PNe: detections or upper limits consistent with both S(12{mu}m)<=0.35S(25{mu}m) and S(25{mu}m)>=0.35S(60{mu}m). 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 identified 454 IRAS sources with radio sources brighter than S~2.5 mJy/beam (equivalent to T~0.8K in the 45" 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 sacrificing completeness.
- ID:
- ivo://CDS.VizieR/J/A+A/592/A103
- Title:
- Planetary nebulae monochromatic images atlas
- Short Name:
- J/A+A/592/A103
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present an atlas of more than one hundred original images of planetary nebulae (PNe). These images were taken in a narrow-band filter centred on the nebular emission of the [NII] during several observing campaigns using two moderate-aperture telescopes, at the Complejo Astronomico El Leoncito (CASLEO), and the Estacion Astrofisica de Bosque Alegre (EABA), both in Argentina. The data provided by this atlas represent one of the most extensive image surveys of PNe in [NII]. We compare the new images with those available in the literature, and briefly describe all cases in which our [NII] images reveal new and interesting structures.
- ID:
- ivo://CDS.VizieR/J/A+A/419/563
- Title:
- Planetary nebulae near the Galactic Center
- Short Name:
- J/A+A/419/563
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We surveyed the central 4x4 degrees of the Galactic center for planetary nebulae in the light of [S III] {lambda}9532 and found 94 PNe that were not previously known, plus 3 that were previously identified as possible candidates. For 63 of these 97 objects, we obtained spectra that are consistent with highly reddened PN while the other 34 could not be recovered spectroscopically and remain unverified. Of the 94 candidates, 54 and 57 were detected via radio at 3 and 6cm, respectively. An additional 20 PNe candidates were found during follow-up H{alpha} imaging but have not yet been verified spectroscopically. Based on the properties of IRAS sources in this region of the Galaxy, and on the total luminosity of the Galactic bulge, the expected number of PNe is 250, only 50% more than the 160 PNe candidates now known. Thus, surveys for PNe in the bulge are approximately two-thirds complete with the remainder likely hidden behind dust.
- ID:
- ivo://CDS.VizieR/J/MNRAS/393/329
- Title:
- Planetary nebulae of NGC 4494
- Short Name:
- J/MNRAS/393/329
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present new Planetary Nebula Spectrograph observations of the ordinary elliptical galaxy NGC 4494, resulting in positions and velocities of 255 planetary nebulae out to seven effective radii (25kpc). We also present new wide-field surface photometry from MMT/Megacam, and long-slit stellar kinematics from VLT/FORS2.
- ID:
- ivo://CDS.VizieR/J/A+A/327/736
- Title:
- Planetary nebulae properties
- Short Name:
- J/A+A/327/736
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We apply a method, described in Gorny et al. (1997, Cat. <J/A+A/318/256>), to derive the masses of 125 central stars of planetary nebulae (PN). This method is self-consistent and distance-independent. It requires the knowledge of the nebular H{beta} fluxes, angular radii and expansion velocities, as well as the stellar visual magnitudes. This method is based on a simple model for the evolution of planetary nebulae, in which the central stars evolve according to the theoretical models of Bloecker (1995, Cat. <J/A+A/299/755>) and Schoenberner (1983ApJ...272..708S). The results are dependent on the assumed total nebular mass. Nevertheless, for any reasonable total nebular mass distribution, we find that the range in planetary nebulae central star masses is very restricted: more than 80% of the objects have a central star mass between 0.55 and 0.65M_{sun}_. We show how to convert, in this mass range, the observed PN central star mass distribution into a zero-age post-AGB star mass distribution.
- ID:
- ivo://CDS.VizieR/J/A+AS/125/289
- Title:
- Planetary nebulae radial velocities
- Short Name:
- J/A+AS/125/289
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The table lists the heliocentric radial velocities for planetary nebulae in the direction of the Galactic bulge. The accuracy is about 2km/s. The measurements were made in June and July 1993, using the ESO CAT with spectral resolution of 30000-60000. Halpha, [NII] 6548 and 6584 and [O III] 5007 were observed.
- ID:
- ivo://CDS.VizieR/J/A+AS/132/13
- Title:
- Planetary nebulae radial velocities
- Short Name:
- J/A+AS/132/13
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a compilation of radial velocities for 867 galactic planetary nebulae (Table 2.ps [postscript format] and Table2.dat [ascii format]).
- ID:
- ivo://CDS.VizieR/J/ApJ/616/804
- Title:
- Planetary Nebula Kinematics in M31
- Short Name:
- J/ApJ/616/804
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present kinematics of 135 planetary nebulae (PNs) in M31 from a survey covering 3.9{deg}^2^ and extending out to 15kpc from the southwest major axis and more than 20kpc along the minor axis. The majority of our sample, even well outside the disk, shows significant rotational support (mean line-of-sight velocity 116km/s).
- ID:
- ivo://CDS.VizieR/J/A+A/634/A47
- Title:
- Planetary nebula NGC3132 MUSE images
- Short Name:
- J/A+A/634/A47
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Two-dimensional spectroscopic data for the whole extent of the NGC3132 planetary nebula have been obtained. We deliver a reduced data-cube and high-quality maps on a spaxel-by-spaxel basis for the many emission lines falling within the Multi-Unit Spectroscopic Explorer (MUSE) spectral coverage over a range in surface brightness >1000. Physical diagnostics derived from the emission line images, opening up a variety of scientific applications, are discussed. Data were obtained during MUSE commissioning on the European Southern Observatory (ESO) Very Large Telescope and reduced with the standard ESO pipeline. Emission lines were fitted by Gaussian profiles. The dust extinction, electron densities, and temperatures of the ionised gas and abundances were determined using Python and PyNeb routines. The delivered datacube has a spatial size of ~63"x123", corresponding to ~0.26x0.51pc^2^ for the adopted distance, and a contiguous wavelength coverage of 4750-9300{AA} at a spectral sampling of 1.25{AA}/pix. The nebula presents a complex reddening structure with high values (c(H{beta})~0.4) at the rim. Density maps are compatible with an inner high-ionisation plasma at moderate high density (~1000cm^-3^), while the low-ionisation plasma presents a structure in density peaking at the rim with values ~700cm^-3^. Median Te, using different diagnostics, decreases according to the sequence [NII],[SII]->[SIII]->[OI]->HeI->Paschen Jump. Likewise, the range of temperatures covered by recombination lines is much larger than those obtained from collisionally excited lines (CELs), with large spatial variations within the nebula. If these differences were due to the existence of high density clumps, as previously suggested, these spatial variations would suggest changes in the properties and/or distribution of the clumps within the nebula. We determined a median helium abundance He/H=0.124, with slightly higher values at the rim and outer shell. The range of measured ionic abundances for light elements are compatible with literature values. Our kinematic analysis nicely illustrates the power of 2D kinematic information in many emission lines, which sheds light on the intrinsic structure of the nebula. Specifically, our derived velocity maps support a geometry for the nebula that is similar to the diabolo-like model previously proposed, but oriented with its major axis roughly at P.A.~22{deg}. We identified two low-surface brightness arc-like structures towards the northern and southern tips of the nebula, with high extinction, high helium abundance, and strong low-ionisation emission lines. They are spatially coincident with some extended low-surface brightness mid-infrared emission. The characteristics of the features suggest that they could be the consequence of precessing jets caused by the binary star system. A simple 1D Cloudy model is able to reproduce the strong lines in the integrated spectrum of the whole nebula with an accuracy of 15% . Together with similar work with MUSE on NGC7009, the present study illustrates the enormous potential of wide field integral field spectrographs for the study of Galactic PNe.
