Fluorescent Excitation of Spectral Lines in Planetary Nebulae

Details Fluorescent Excitation of Spectral Lines in Planetary Nebulae Fluorescent Excitation of Spectral Lines in Planetary Nebulae

2000-01-06

arxiv.org/abs/astro-ph/0001086v1

Astronomy and Astrophysics

Astrophysics

5 pages, 4 figures (fig.4 in color), ApJ (in press)

Scientific paper

10.1086/308941

Fluorescent excitation of spectral lines is demonstrated as a function of temperature-luminosity and the distance of the emitting region from the central stars of planetary nebulae. The electron densities and temperatures are determined, and the method is exemplified through a detailed analysis of spectral observations of a high excitation PN, NGC 6741, observed by Hyung and Aller(1997). Fluorescence should also be important in the determination of element abundances. It is suggested that the method could be generally applied to determine or constrain the luminosity and the region of spectral emission in other intensively radiative sources such as novae, supernovae, and active galactic nuclei.

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