# Very deep spectroscopy of the bright Saturn nebula NGC 7009 – II. Analysis of the rich optical recombination spectrum

@article{Fang2013VeryDS,
title={Very deep spectroscopy of the bright Saturn nebula NGC 7009 – II. Analysis of the rich optical recombination spectrum},
author={X. Fang and Xiaowei Liu},
journal={Monthly Notices of the Royal Astronomical Society},
year={2013},
volume={429},
pages={2791-2851}
}
• Published 2 December 2012
• Physics
• Monthly Notices of the Royal Astronomical Society
[Abridged] We present a critical analysis of the rich optical recombination spectrum of NGC 7009, in the context of the bi-abundance nebular model proposed by Liu et al. (2000). The observed relative intensities are compared with the theoretical predictions based on high quality effective recombination coefficients, now available for the recombination line spectrum of a number of heavy element ions. The possibility of plasma diagnostics using the optical recombination lines (ORLs) of heavy… Expand
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