Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...308..721t&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 308, Sept. 15, 1986, p. 721-727.
Astronomy and Astrophysics
Astrophysics
146
Magnesium, Neon, Novae, Oxygen, Stellar Composition, White Dwarf Stars, Frequency Distribution, Stellar Mass Ejection
Scientific paper
The question of the expected frequency of occurrence of oxygen-neon-magnesium (ONeMg) degenerate dwarfs in classical nova systems is examined. Heavy-element abundance enrichments observed in nova ejecta are reviewed, and possible interpretations of their origins are discussed. It is concluded that these abundance enrichments imply the presence of ONeMg white dwarfs, and it is estimated that they might be expected to account for a significant fraction of the observed outbursts. Particular attention is given to providing a realistic estimate of the magnitude of the selection effect which operates to insure the occurrence of a significant population of ONeMg white dwarfs in these systems. The implications of these findings are reviewed, and possible complicating factors are discussed.
Livio Mario
Truran Jame. W.
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