Properties of planetary nebulae. II - Central star evolution

Details Properties of planetary nebulae. II - Central star evolution Properties of planetary nebulae. II - Central star evolution

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...209..369g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 209, no. 1-2, Jan. 1989, p. 369-381.

Astronomy and Astrophysics

Astrophysics

64

Infrared Stars, Planetary Nebulae, Stellar Evolution, Stellar Luminosity, Stellar Temperature, Galactic Bulge, Globular Clusters, H Beta Line, Hertzsprung-Russell Diagram, Mass Distribution, Stellar Magnitude

Scientific paper

The evolution of central stars is studied, using a sample of planetary nebulae with accurate, individually determined distances. The central star luminosities and effective temperatures are calculated from central star magnitudes. The central star positions in the HR diagram are compared with theoretical evolutionary track, showing that the observed ages of planetary nebulae with central stars are much smaller than predicted. Also, relatively cool central stars with luminosities lower than 1,000 solar luminosity are observed, suggesting that planetary nebulae formation can take place at lower luminosities than previously assumed.

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