Other
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...295..537s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 295, Aug. 15, 1985, p. 537-546.
Other
101
Astronomical Photometry, Early Stars, Planetary Nebulae, Stellar Magnitude, Astronomical Photography, Stellar Color, Stellar Temperature, Tables (Data)
Scientific paper
The paper presents new B- and/or V-magnitudes for the nuclei of 51 planetary nebulae, as well as limits for 10 others, from absolute photometry with the University of Illinois 1 m telescope, and a superior method of extracting stellar continuum fluxes from a bright nebular background. The errors and the limitations of the method are carefully examined. The results are compared with the widely circulated list of preliminary central-star magnitudes determined by Shao and Liller, which are shown to suffer frequently from severe contamination from the nebular continuum, and a calibration is provided for older photographic magnitudes. Finally, the nebular contribution to the continuum in the context of the evolution of central stars on the log L-log T plane is examined, and the implications for future observations of hot and/or young planetary nuclei are discussed.
Kaler James B.
Shaw Richard A.
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