Far-UV Temperature Diagnostics for Hot Central Stars of Planetary Nebulae

Details Far-UV Temperature Diagnostics for Hot Central Stars of Planetary Nebulae Far-UV Temperature Diagnostics for Hot Central Stars of Planetary Nebulae

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1135..177s&link_type=abstract

FUTURE DIRECTIONS IN ULTRAVIOLET SPECTROSCOPY: A Conference Inspired by the Accomplishments of the Far Ultraviolet Spectroscopic

Computer Science

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Interstellar Medium And Nebulae In External Galaxies, Luminosities, Magnitudes, Effective Temperatures, Colors, And Spectral Classification, Quasars, Active Or Peculiar Galaxies, Objects, And Systems

Scientific paper

We report on an analysis and modeling of the FUSE spectrum of HD 200516, the central star of NGC 7009, and find strong evidence that the effective temperature is close to 95,000 K. This is significantly hotter than the 82,000 K found from the analysis of optical He II lines. This determination used the numerous lines of highly ionized abundant elements (O, Fe, Ni) that are located in the far-UV spectrum of hot post-AGB stars. There is also evidence that the fluorine abundance in HD 200516 may be significantly enhanced.

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