Evolution of low temperature white dwarfs to thermonuclear runaway

Details Evolution of low temperature white dwarfs to thermonuclear runaway Evolution of low temperature white dwarfs to thermonuclear runaway

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apl....17...19d&link_type=abstract

Astrophysical Letters, vol. 17, no. 1, 1976, p. 19-22.

Astronomy and Astrophysics

Astrophysics

7

Stellar Evolution, Stellar Temperature, Thermonuclear Reactions, White Dwarf Stars, Electron Capture, Ignition, Low Temperature, Magnetohydrodynamic Stability

Scientific paper

High-temperature degenerate cores (about 100 million K) are susceptible to thermonuclear runaway at the 'ignition line' where nuclear-energy generation rates are equal to neutrino energy-loss rates. In contrast, low-temperature white dwarfs (about 1 million K) do not necessarily suffer thermal runaway at the ignition line because the nuclear rates are intrinsically low. Adiabatic contraction (due to mass accretion) does lead to a thermal runaway before collapse due to electron capture, or general-relativistic instability can ensue.

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