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Title:
Apparent magnitudes of luminous planetary nebula nuclei. I Method and application
Authors:
Shaw, R. A.; Kaler, J. B.
Affiliation:
AA(Illinois, University, Urbana), AB(Illinois, University, Urbana)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 295, Aug. 15, 1985, p. 537-546. (ApJ Homepage)
Publication Date:
08/1985
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL PHOTOMETRY, EARLY STARS, PLANETARY NEBULAE, STELLAR MAGNITUDE, ASTRONOMICAL PHOTOGRAPHY, STELLAR COLOR, STELLAR TEMPERATURE, TABLES (DATA)
DOI:
10.1086/163397
Bibliographic Code:
1985ApJ...295..537S

Abstract

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.

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