Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...209..103l&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 209, no. 1-2, Jan. 1989, p. 103-110.
Astronomy and Astrophysics
Astronomy
13
Black Holes (Astronomy), Degenerate Matter, Nuclear Fusion, Stellar Orbits, White Dwarf Stars, Eccentric Orbits, Stellar Composition, Supernovae
Scientific paper
The mechanical and chemical behavior of a degenerate dwarf star passing inside the tidal radius of a moderately massive black hole is investigated. The effective tidal radius for parabolic orbits is derived. For deeper plunging, the stellar core undergoes strong compression; the affine star model with a semidegenerate, semirelativistic equation of state is used to describe the evolution of thermodynamical parameters such as density, temperature, and electron degeneracy. The dynamics are coupled with a nuclear network to explore explosive nucleosynthesis during strong compression phase. Nuclear processes can be triggered only in helium stars, which build up heavy isotopes with alpha structure. In the most favorable cases the nuclear energy release is comparable to that of type II supernovae.
Luminet Jean-Pierre
Pichon Bernard
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