Narrow-band photometry of Wolf-Rayet stars and planetary nebulae

1990 ◽  
Vol 171 (1-2) ◽  
pp. 157-160
Author(s):  
Eugenio E. Mendoza V.
Keyword(s):  
Narrow Band ◽  
Planetary Nebulae

scholarly journals The halo of M49 and its environment as traced by planetary nebulae

2016 ◽  
Vol 12 (S323) ◽  
pp. 293-297
Author(s):  
Johanna Hartke ◽  
Magda Arnaboldi ◽  
Alessia Longobardi ◽  
Ortwin Gerhard ◽  
Ken Freeman ◽  
...  
Keyword(s):  
Morphological Variation ◽  
Luminosity Function ◽  
Narrow Band ◽  
Planetary Nebulae ◽  
Stellar Populations ◽  
Virgo Cluster ◽  
Cluster Galaxy ◽  
Outer Component ◽  
Stellar Halo ◽  
Galaxy Halo

AbstractWe investigate the stellar halo of the nearby elliptical Virgo-cluster galaxy M49 using Planetary Nebulae (PNe). M49 is the second-brightest galaxy of the Virgo cluster and is at the center of the Virgo subcluster B. We present an extended catalogue extracted from a narrow-band survey carried out with Subaru’s Suprime Cam, consisting of 735 PNe down to a limiting magnitude of m5007 = 29.3. This PNe population traces the halo out to 155 kpc from the galaxy’s center, which provides accurate measurement of the luminosity-specific PN-number (α-parameter) in the inner and outer regions of M49’s halo. We are also able to determine the morphological variation of the planetary nebulae luminosity function (PNLF), that may trace different parent stellar populations. This enables us to identify the transition from the PN-scarce, possibly metal-rich, galaxy halo to the PN-rich, metal-poor, outer component.

scholarly journals Electron Temperature and Density Mapping in Planetary Nebulae

1978 ◽  
Vol 76 ◽  
pp. 163-164
Author(s):  
N.K. Reay ◽  
S.P. Worswick
Keyword(s):  
Electron Temperature ◽  
Relative Intensity ◽  
Linear Response ◽  
Narrow Band ◽  
Planetary Nebulae ◽  
Emission Lines ◽  
Simple Method ◽  
Density Mapping ◽  
Intensity Ratios

The linear response of the electronographic process provides a simple method for producing relative intensity ratios of emission lines across a complete nebula. Using narrow-band filters to isolate those lines which are sensitive to electron temperature and density changes, it is possible to map the gross variation of these quantities across the object.

scholarly journals Narrow Band Photometry and Mapping of the Planetary Nebulae NGC 6210 and NGC 7009

1989 ◽  
Vol 131 ◽  
pp. 49-49
Author(s):  
E.E. Mendoza ◽  
C. Chavarría-K. ◽  
V.M. Arévalo
Keyword(s):  
Narrow Band ◽  
Planetary Nebulae ◽  
Emission Lines ◽  
San Pedro

This paper is based upon observations carried out at the Observatorio Astronómico Nacional, San Pedro Mártir, B.C.N. México. They are of two types: (1) α(16)Λ(9)-photometry, obtained with the 1.5-m Johnson telescope, and (2) maps at the wavelengths of Hα and λ7751 A [Ar III] emission lines secured with the 2.1-m telescope.

scholarly journals Deep Narrow Band Interference Filter Photographs of Selected Extended Planetary Nebulae

1989 ◽  
Vol 131 ◽  
pp. 171-171
Author(s):  
M. Rosado ◽  
M. Moreno
Keyword(s):  
Narrow Band ◽  
Planetary Nebulae ◽  
Interference Filter ◽  
Single Stage ◽  
Image Tube ◽  
San Pedro ◽  
Step Density

Narrow-band interference filter photographs in the light of Hα, [S II] (λ = 6717 and 6731 A). [N II] (λ = 6584 A) and [O III] (λ = 4363 A) of four extended PNs are shown. These photographs were obtained with a focal reducer and a single-stage image tube attached to the 2.1 m Cassegrain focus telescope of the Observatorio Astronómico Nacional at San Pedro Mártir, B.C.N. The exposure times were of one hour. For each photograph we have obtained a calibration by means of a step density wedge.

scholarly journals Analysis of Multiple Shell Planetary Nebulae Based on HST/WFPC2 Extended 2D Diagnostic Diagrams

Galaxies ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 84 ◽  
Author(s):  
Daniela Barría ◽  
Stefan Kimeswenger
Keyword(s):  
Ionizing Radiation ◽  
Electron Temperature ◽  
Thermodynamic Parameters ◽  
Narrow Band ◽  
Hubble Space Telescope ◽  
Planetary Nebulae ◽  
Wide Field ◽  
Spatially Resolved ◽  
Gaseous Nebulae ◽  
Hα Emission

The investigation of gaseous nebulae, emitting in forbidden lines, is often based extensively on diagnostic diagrams. The special physics of these lines often allows for disentangling with a few line ratios normally coupled thermodynamic parameters like electron temperature, density and properties of the photo-ionizing radiation field. Diagnostic diagrams are usually used for the investigation of planetary nebulae as a total. We investigated the extension of such integrated properties towards spatially resolved 2D diagnostics, using Hubble Space Telescope/Wide Field Planetary Camera 2 (HST/WFPC2) narrow band images. For this purpose, we also derived a method to isolate pure Hα emission from the [N ii] contamination as normally suffering in the F656N HST/WFPC2 filter.

scholarly journals Morphology and Evolution of Planetary Nebulae

1993 ◽  
Vol 155 ◽  
pp. 482-482
Author(s):  
L. Stanghellini ◽  
R. L. M. Corradi ◽  
H. E. Schwarz
Keyword(s):  
Narrow Band ◽  
Planetary Nebulae ◽  
Evolutionary Stage ◽  
Large Set

A large set of narrow-band images of planetary nebulae (PNe) have been studied together with the location of their nuclei (PNNi) on the logTeff – logL/L⊙ plane, in order to disclose possible correlations between the morphological class of the PNe and the evolutionary stage of their PNNi.

scholarly journals Sub-Arcsecond Morphology of Planetary Nebulae

2010 ◽  
Vol 27 (2) ◽  
pp. 180-186 ◽  
Author(s):  
L. F. Miranda ◽  
G. Ramos-Larios ◽  
M. A. Guerrero
Keyword(s):  
Narrow Band ◽  
Planetary Nebulae ◽  
Small Scale ◽  
High Quality ◽  
Fine Structures ◽  
Scale Structures ◽  
Small Scale Structures

AbstractPlanetary nebulae (PNe) can be roughly categorized into several broad morphological classes. The high quality images of PNe acquired in recent years, however, have revealed a wealth of fine structures that preclude simplistic models for their formation. Here we present narrow-band, sub-arcsecond images of a sample of relatively large PNe that illustrate the complexity and variety of small-scale structures. This is especially true for bipolar PNe, for which the images reveal multi-polar ejections and, in some cases, suggest turbulent gas motions. Our images also reveal the presence or signs of jet-like outflows in several objects in which this kind of component has not been previously reported.

Sign in / Sign up

Export Citation Format

Share Document