Angular dimensions of planetary nebulae

  title={Angular dimensions of planetary nebulae},
  author={Romuald Tylenda and Natasza Si{\'o}dmiak and Sławomir K. G{\'o}rny and Romano L. M. Corradi and Hugo E. Schwarz},
  journal={Astronomy and Astrophysics},
We have measured angular dimensions of 312 planetary nebulae from their images obtained in H α (or H α  + [NII]). We have applied three methods of measurements: direct measurements at the 10% level of the peak surface brightness, Gaussian deconvolution and second-moment deconvolution. The results from the three methods are compared and analysed. We propose a simple deconvolution of the 10% level measurements which significantly improves the reliability of these measurements for compact and… 
A revised distance scale of planetary nebulae
Context. The advent of large-scale, high-sensitivity surveys of the Galaxy (2MASS, WISE, Spitzer, etc.) has allowed detection of a large number of planetary nebulae (PNe), some of them at large
Characterization of the planetary nebula Tc 1 based on VLT X-shooter observations
We present a detailed analysis of deep VLT/X-Shooter observations of the planetary nebula Tc 1. We calculate gas temperature, density, extinction, and abundances for several species from the
Determination of Planetary Nebulae angular diameters from radio continuum spectral energy distribution modelling
Powerful new, high resolution, high sensitivity, multi-frequency, wide-field radio surveys such as the Australian Square Kilometre Array Pathfinder (ASKAP) Evolutionary Map of the Universe (EMU) are
Absolute spectrophotometry of northern compact planetary nebulae
We present medium-dispersion spectra and narrowband images of six northern compact planetary nebulae (PNe): BoBn 1, DdDm 1, IC 5117, M 1-5, M 1-71, and NGC 6833. From broad-slit spectra, total
Planetary Nebulae towards the Galactic bulge – I. [O iii] fluxes
We present [OIII]"5007 fluxes and angular diametres for 435 Planetary Nebulae (PNe) in the central 10 ! "10 ! region towards the Galactic bulge. Our sample is taken from the new discoveries of the
Morpho-kinematic Properties of Wolf–Rayet Planetary Nebulae
The majority of planetary nebulae (PNs) show axisymmetric morphologies, whose causes are not well understood. In this work, we present spatially resolved kinematic observations of 14 Galactic PNs
Very Large Telescope Echelle Spectrophotometry of the Planetary Nebula NGC 5307 and Temperature Variations
Echelle spectrophotometry of the planetary nebula NGC 5307 is presented. The data consist of Very Large Telescope Ultraviolet Visual Echelle Spectrograph observations in the 3100-10360 Å range.
Millimeter observations of Planetary Nebulae: a contribution to the Planck pre-launch catalogue
Aims. We present 43 GHz (7 mm) observations of a sample of radio-bright Planetary nebulae aimed to obtain, together with far-IR measurements (IRAS), reliable estimates of the fluxes emitted in the
Angular diameters, fluxes and extinction of compact planetary nebulae: further evidence for steeper extinction towards the bulge
We present values for angular diameter, flux and extinction for 70 Galactic planetary nebulae observed using narrow-band filters. Angular diameters are derived using constant emissivity shell and
A new planetary nebula in the outer reaches of the Galaxy
Aims. A proper determination of the abundance gradient in the Milky Way requires the observation of objects at large galactiocentric distances. With this aim, we are exploring the planetary nebula


An analysis of the observed radio emission from planetary nebulae
We have analysed the radio fluxes for 264 planetary nebulae for which reliable measurements of fluxes at 1.4 and 5 GHz, and of nebular diameters are available. For many of the investigated nebulae,
Measuring angular diameters of extended sources
When measuring diameters of partially resolved sources like planetary nebulae, H II regions or galaxies, often a technique called Gaussian deconvolution is used. This technique yields a Gaussian
An atlas of images of Planetary Nebulae
A catalogue of narrowband CCD images of 100 southern and 1 northern Planetary Nebulae is presented. The data are images taken in the light of the H α , H β , [OIII]500.7 nm, and [NII]658.4 nm lines.
Chemical Abundances of Galactic Planetary Nebulae
The chemical composition of 86 planetary nebulae from the Strasbourg-ESO survey are analysed (Acker et al., 1989; Koppen et al., 1991). Strong correlations between O, S, Ar, as well as between N and
Strasbourg-ESO Catalogue of Galactic Planetary Nebulae
A list of 1820 objects, each of them called at least once a planetary nebula, has been inspected; 1143 of them have been classified as true or probable planetary nebulae by the authors of the
The IAC Morphological Catalog of Northern Galactic Planetary Nebulae
Planetary Nebulae (PNs) are highly representative of the late stages of intermediate mass stellar evolution. However, there are still many unresolved questions in their evolutionary scheme. Mass loss