A distance-independent test of planetary nebulae nuclei evolution

Details A distance-independent test of planetary nebulae nuclei evolution A distance-independent test of planetary nebulae nuclei evolution

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...237..495s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 237, no. 2, Oct. 1990, p. 495-503.

Astronomy and Astrophysics

Astrophysics

11

Planetary Nebulae, Stellar Evolution, Astronomical Models, Helium, Hydrogen, Stellar Mass

Scientific paper

A distance-independent diagram is used to study the evolution of the central stars of planetary nebulae. Comparison between theoretical evolutionary tracks and observed positions of about 200 nebulae on the proposed diagram, shows that the mass distribution of the central stars is narrowly concentrated around 0.60 M(0). From an analysis of evolutionary timescales for hydrogen and helium burning models, it appears that planetary nebulae are formed during quiescent hydrogen burning rather than at the time of a helium shell flash. The established correlation between the mass of the central stars and their position in the present diagram has been used to analyze some recent results.

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