Tidally-detonated nuclear reactions in main sequence stars passing near a large black hole

Details Tidally-detonated nuclear reactions in main sequence stars passing near a large black hole Tidally-detonated nuclear reactions in main sequence stars passing near a large black hole

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...209...85l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 209, no. 1-2, Jan. 1989, p. 85-102.

Astronomy and Astrophysics

Astrophysics

17

Black Holes (Astronomy), Main Sequence Stars, Nuclear Astrophysics, Nuclear Fusion, Stellar Models, Stellar Physics, Eccentric Orbits, Gravitational Fields, Stellar Cores, Stellar Mass Accretion, Supernovae

Scientific paper

The affine star model coupled with a nuclear network is used to explore the nucleosynthesis in highly compressed states undergone by a main-sequence star on a parabolic orbit plunging into the tidal radius of a 10 to the 5th to 10 to the 6th solar mass black hole. Since this kind of accidental nucleosynthesis takes place in a medium with unusual chemical composition (compared to that of presupernovae), it was necessary to build a specific nuclear network involving isotopes near the proton drip line. As a result, final abundances with respect to isotopic composition are different from those which are produced in supernovae explosions. Chemical details depend on various parameters such as the black hole mass, the stellar mass, the initial chemical composition, and the penetration factor of the orbit. In most cases of interest, N-15, Mg-25, Al-26, Mg-26, and Al-27 are produced with mass fractions greater than 0.001. Nuclear energy generation is then largely sufficient to unbind the star.

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