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Galaxies 2018, 6(3), 84; https://doi.org/10.3390/galaxies6030084

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

1
Instituto de Astronomía, Universidad Católica del Norte, Av. Angamos 0610, 1240000 Antofagasta, Chile
2
Institut für Astro- und Teilchenphysik, Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria
*
Author to whom correspondence should be addressed.
Received: 27 June 2018 / Revised: 30 July 2018 / Accepted: 1 August 2018 / Published: 3 August 2018
(This article belongs to the Special Issue Asymmetric Planetary Nebulae VII)
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Abstract

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. View Full-Text
Keywords: planetary nebulae; stars: AGB and post-AGB; late stage stellar evolution planetary nebulae; stars: AGB and post-AGB; late stage stellar evolution
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Barría, D.; Kimeswenger, S. Analysis of Multiple Shell Planetary Nebulae Based on HST/WFPC2 Extended 2D Diagnostic Diagrams. Galaxies 2018, 6, 84.

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