The evolution of large planetary nebulae and their central stars

Details The evolution of large planetary nebulae and their central stars The evolution of large planetary nebulae and their central stars

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...271..188k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 271, Aug. 1, 1983, p. 188-220.

Astronomy and Astrophysics

Astrophysics

258

Abundance, Astronomical Spectroscopy, Planetary Nebulae, Spectrophotometry, Stellar Evolution, H Lines, Helium, Lyman Spectra, Mass Distribution, Nitrogen, Oxygen, Star Distribution

Scientific paper

A description is presented of results obtained in wide aperture spectrophotometry studies of large planetary nebulae, taking into account the interpretation of the data in terms of location on the log L-log T plane, abundances, and morphology. The criterion for consideration is that the nebular radius be larger than 0.175 pc, where the distance and radius are based upon the distance scale used by Cahn and Kaler (1971), the measured H-beta flux, and extinction, and the largest angular radius given by Perek and Kohoutek (1967). Attention is given to the photometry provided by the Prairie Observatory, published photometry, the calibration of photographic fluxes, a comparison with radio fluxes, the coordinates of the nebulae, central star magnitudes, angular radii and geometric filling factors, distances and radii, Zanstra temperatures and luminosities, the choice of temperature and luminosity, nitrogen-to-oxygen ratios, the distribution of core masses, time scales, and questions of evolution and stellar mass.

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