Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...313..268h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 313, Feb. 1, 1987, p. 268-283.
Astronomy and Astrophysics
Astrophysics
38
Mass Distribution, Planetary Nebulae, Stellar Evolution, Magellanic Clouds, Stellar Interiors, Stellar Magnitude, Ultraviolet Spectra
Scientific paper
The authors report on a study to determine the mass distribution and evolutionary scheme for planetary nuclei. First, absolute magnitudes were derived from ultraviolet stellar magnitudes for 68 galactic planetaries and three planetaries in the Magellanic Clouds. By comparing the luminosities and ages since the formation of the nebula with evolutionary calculations, the authors infer a mass range from 0.55 M_sun; up to 0.8 M_sun; or more. Population characteristics over this mass range are sharply distinct. Using spatial and kinematic characteristics to infer initial mass, they find that the higher mass (M ≥ 0.64) nuclei are concentrated in the galactic disk and derive from stars with initial masses of ≡1.5 M_sun;, while the low-mass nuclei (M ≡ 0.55) belong to the old disk or halo populations and derive from stars with initial masses of ≡1.0 M_sun; or less.
Augensen Harry John
Heap Sara R.
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