Abstract
The [O II]3726,3729Å doublet is sensitive to electron densities in the range 100 to 104 cm-3, typical of planetary nebulae, and thus provides an ideal tool for mapping the projected density structure. The first use of the imaging Fabry-Perot TAURUS-II to observe both the [O II] doublet lines, and hence map the electron density, is reported for NGC 6826. If sufficient spectral resolution is achieved both the [O II] lines can be resolved into separate components, opening the way to full 3-D density mapping of PN. Given the low finesse of the etalon and the low expansion velocity in NGC 6826 (10–15 kms-1), this original hope could not be fulfilled. However, a restricted aim of seeing-limited electron density mapping was accepted.
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Barker, T., 1988, ApJ, 326, 164.
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© 1997 Springer Science+Business Media Dordrecht
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Dudziak, G., Walsh, J.R., Walton, N. (1997). [O II] Electron Density Mapping applied to NGC 6826. In: Habing, H.J., Lamers, H.J.G.L.M. (eds) Planetary Nebulae. International Astronimical Union / Union Astronomique Internationale, vol 180. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5244-0_80
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DOI: https://doi.org/10.1007/978-94-011-5244-0_80
Publisher Name: Springer, Dordrecht
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